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distance

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318 articles trouvés pour ce sujet.
 
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Walking up and down a hill 2017-09-19
Justina pose la question :
At 2:20 p.m. Jack is at the top of the hill and starts walking down at the exact same time that Jill, who is at the bottom of the hill, starts walking up. If they maintain the uphill speed of 2mph and downhill speed of 4mph and the distance from the bottom to the top of the hill is 1.5 mi, at what time will Jack and Jill meet?
Penny Nom lui répond.
Up a hill and down again 2017-09-17
justina pose la question :
Jack and Jill travel up a hill at a speed of 2mi/h.they travel back down the hill at a speed of 4mi/h.what is their average speed for the entire trip? express your answer as a mixed number
Penny Nom lui répond.
A car on a rough road and a concrete road 2017-08-27
Ken pose la question :
A car is driven on a rough road at a speed of 25km and then on a concrete road with a speed of 70kph. The car has 5.5 hours to travel 225km. How long did the car travel on concrete road?
Penny Nom lui répond.
A police officer spots a speeding car 2017-07-20
Josh pose la question :
Marie, a police officer, spots a speeding car and starts chasing it. The speeding car travels at a speed of 130 feet per second. Marie's car reaches a constant speed of 145 feet per second 1725 feet from the start of the chase. During that time, the speeding car has traveled 3150 feet. Write a system of equations to represent this situation.
Penny Nom lui répond.
How fast am I travelling? 2017-06-24
corey pose la question :
if i travel 2 miles in 10 seconds, how fast am i travelling please
Penny Nom lui répond.
A man drives 48km in 45 minutes 2017-06-03
Jamal pose la question :
A man drives from Ibadan to Oyo a distance of 48km in 45 minutes. If he drives at 72km/h where the surface is good and 48km/h where the surface is bad. Find the number of kilometers of good surfaces
Penny Nom lui répond.
Initial velocity 2017-05-23
Annelle pose la question :
a body is thrown vertically downward from a height above the ground. determine the initial velocity and the height of the starting point if after 4 secs it reaches the ground with velocity of 68 m/s.
Penny Nom lui répond.
The length of a train 2017-04-24
Stefano pose la question :
If a freight train is coming towards you and you were traveling at 85 miles an hour and it takes 35 seconds for the train to pass you how long is the train

Figure 50mph for train

Penny Nom lui répond.
Travelling upstream and downstream 2016-10-17
Kathleen pose la question :
It took a boat 2 hours to reach town A going upstream. The way back was 1h20 min. What is the speed of the boat in still water if the speed of the stream is 3 mph?
Penny Nom lui répond.
A car chase 2016-09-25
Ms. pose la question :
Car 1 is traveling down the road at 50 mph and passes Car 2 is sitting on the side of the road. Car 2 needs to catch Car 1 one half mile down the road. How fast must Car 2 drive to catch Car 1 if Car 2 waits 10 seconds before pursuing Car 1?

Yes, the assumption is that the Car 2 can accelerate from a standing position and over take Car 1 rate. What is the answer or formula for this type of question?
Respectfully
Befuddled Mom?

Penny Nom lui répond.
How fast and how far must Car 2 travel before catching Car 1? 2016-09-25
Ms. pose la question :
Car 1 is traveling down the road at 50 mph and passes Car 2 is sitting on the side of the road. Car 2 needs to catch Car 1 one half mile down the road. How fast must Car 2 drive to catch Car 1 if Car 2 waits 10 seconds before pursuing Car 1?

Yes, the assumption is that the Car 2 can accelerate from a standing position and over take Car 1 rate. What is the answer or formula for this type of question?
Respectfully
Befuddled Mom?

Penny Nom lui répond.
The distance around a warehouse 2016-09-21
Chuck pose la question :
How far do I walk when I walk around a 751,000 sq. ft. warehouse?
Penny Nom lui répond.
John and Max walk to meet each other 2016-05-29
abhay pose la question :
The speeds of John and Max are 30 km/h and 40 km/h.Initially Max is at a place L and John is at a place M. The distance between L and M is 650 km. John started his journey 3 hours earlier than Max to meet each other. If they meet each other at a place P somewhere between L and M, then the distance between P and M is?
Penny Nom lui répond.
At what time will Sara catch up with Jake? 2016-05-07
Laura pose la question :
At 11:00 a.m., Jake started driving along a highway at constant speed of 50 miles per hour. A quarter of an hour later, Sara started driving along the same highway in the same direction as Jake at the constant speed of 65 miles per hour. At what time will Sara catch up with Jake?
Penny Nom lui répond.
A 3 hour river cruise 2016-05-06
Jan pose la question :
A 3 hour river cruise goes 15km upstream and then back again.The river has a current speed of 2km/h.what is the boat's speed and how long was the upstream journey?
Penny Nom lui répond.
A road trip word problem 2016-04-10
Marc pose la question :
While on a road trip I imagined this random word problem. Suppose I start a trip of 75 miles. My initial speed is 75 miles per hour. After every mile traveled I decrease my speed by one mile per hour. After the first mile I decrease my speed to 74 miles per hour and so on for each subsequent mile traveled. How long will it take to complete the 75 mile journey?
Penny Nom lui répond.
Biking and jogging 2016-03-17
alondra pose la question :
Ricky went on a bike ride. After 6 miles he got a flat tire and had to jog home. He jogs 3mph slower than he bikes, so the jog took 1 hour longer than the bike ride. At what rate did he travel each way?
Penny Nom lui répond.
Travelling with and against he current 2016-02-09
Lloyd pose la question :
A boat travelled 210 miles downstream and back. The trip downstream took 10hrs, the trip back took 70hrs
1. what is the speed of the current?
2. what is the speed of the boat in still water?

Penny Nom lui répond.
A two car competition 2016-02-02
Christian pose la question :
Question: Two cars are racing to a fixed point and back. One car travels 70 MPH both ways While the other travels 60 MPH there and 80 MPH back, which car won the race? It is not a tie.
Penny Nom lui répond.
Matthew skateboards around the school 2015-12-09
Abigail pose la question :
Matthew skateboards 4km each hour.
How long will it take him to skateboard around the school yard measuring 300m by 200m.? Thank you.

Penny Nom lui répond.
Travelling in opposite directions 2015-12-06
Roselyn pose la question :
Jenny and Mark commute to work, travelling in opposite directions. Jenny leaves the house at 8 AM, and averages 35 kph. Mark leaves at 8:15 AM, and averages 40 kph.At what time will they be 40 kilometers apart?
Penny Nom lui répond.
Riding a mountain bike up and down a mountain 2015-12-02
sam pose la question :
Michael, can climb a mountain at 2.5km/hr on his mountain bike. he descends the mountain at 5.5km/hr. he completes the whole circuit in 7 hours. how long is the trail to the top of the mountain?
Penny Nom lui répond.
The distance between two boats 2015-07-26
mohammad pose la question :
Two boats leave the same dock at the same time,one traveling due east at 10 mph and the other due north at 24mph,how many miles apart are the boats after 3hours ?
Penny Nom lui répond.
Two lorries approaching an intersection 2015-05-15
Nuraini pose la question :
Two straight roads intersect at the right angles. Lorry A, moving on one of the roads, Approaches the intersection at 50mi/h and lorry B, moving on the other roads, approaches the intersection at 20mi/h. At what rate is the distance between the lorry changing when A is 0.4 mile from the intersection and B is 0.3 mile from the intersection?
Penny Nom lui répond.
Two cars approaching an intersection 2015-04-16
Engabu pose la question :
Car A is traveling west at 50km/h & car B is traveling north at 60km/h. both are headed for the intersection of the two roads. At what rate are the cars approaching each other when car A is 3km & car B is 4km from the intersection?
Penny Nom lui répond.
Two airplanes 2015-04-14
john pose la question :
two planes leave an airport at the same time, one going northwest (N35*W)at 400 mph and the other going east at 332 mph. How far apart are the planes after 4 hours to the nearest mile?
Penny Nom lui répond.
A train trip 2015-03-23
Ngcebo pose la question :
A train travels a distance of 720 km at a speed of x km/h. on the return journey, it travels at an average speed of y km/h and completes the whole journey in an hour less. if the speed during the return journey was 10 km/h more, what were the speeds in m/s
Penny Nom lui répond.
Average rate for a return trip 2015-03-14
Michael pose la question :
Jeffrey drove to a town 25 miles away at an average speed of 50 miles per hour. The return trip along the same route took 20 minutes longer than the trip to town. Determine the average speed in miles per hour for Jeffrey's round trip.
Penny Nom lui répond.
Istanbul to Lagos 2015-03-03
Victor pose la question :
A plane flies from Istanbul to Lagos at 800km/h and then returns to Istanbul at 900km/h. The return trip takes 1 hour less than the flight to Lagos. What is the distance between Istanbul and Lagos?
Penny Nom lui répond.
Distance, time and rate for three people 2015-02-15
Mubashir pose la question :
Steven left Town A and walked towards Town B at a speed of 100m/min. At the same time, Jason and Melvin started from Town B and walked towards Town A at a speed of 80m/min and 75m/min respectively. If Steven met Melvin six minutes after passing Jason, find the distance between Town A and Town B.
Penny Nom lui répond.
Stopping distance 2015-02-11
Audrey pose la question :
A Harley Davidson motor cycle weighing 650 lbs with a rider weighing 175 bs was going 40 miles per hour. He had to make a sudden stop . Slammed on brakes. How long a distance for him to stop?
Penny Nom lui répond.
A circle and a chord 2015-02-07
Dakota pose la question :
If the diameter of a circle is 48 cm, find the shortest distance from a chord of length 34 cm to the center of the circle
Penny Nom lui répond.
Speed, distance and time 2015-02-06
Terry pose la question :
How many seconds would it take to travel 0.18 km at a speed of 130km per hour?
Penny Nom lui répond.
Two cars pass each other going in opposite directions 2015-02-03
Caroline pose la question :
Two cars pass each other going i opposite directions. One car is going 100 km/h and the other is going 80 km/h. How far apart will the two cars be after driving 45 minutes at these rates of speed?
Penny Nom lui répond.
A train from Vancouver to Whistler 2015-02-02
Tea pose la question :
Serena and Nina are taking a train from Vancouver to Whistler, a 160km trip. If the average speed is decreased by 16km/hr, the trip will be 1/2 hours longer. What is the average speed of the train? Thanks :)
Penny Nom lui répond.
A motorbike race 2015-01-25
Pramegh pose la question :
In a motorbike race of 75 km, the winner completes the race with a lead of 300 meters and 8 seconds before the second rider. Considering the riders ride with an average speed, find the difference between their speeds with which they completed the race.
(Calculate up to 2 decimal places)

Penny Nom lui répond.
Two cars 2015-01-18
taylor pose la question :
two cars leave the park at the same time, one traveling north at a speed 10 mph faster than the other which is traveling south. after 3 hours the cars are 420 miles apart. find the speed of both cars
Penny Nom lui répond.
196 kilometer in2 hours 2014-12-29
Ekanem pose la question :
QQ A motorist had planned to reach a place 196km in two hrs exactly. For the first 15km he was able to average only 40km/h. What average speed must he keep up for the rest of the journey if he is to arrive on time.
Penny Nom lui répond.
What is the speed of the boat in still water? 2014-10-30
Adam pose la question :
The current in a stream moves at a speed of 2 km/h. A boat travels 38 km upstream and 38 km downstream in a total time of 3 hr. What is the speed of the boat in still water?
Penny Nom lui répond.
A man a ship and a wharf 2014-09-26
Ralph pose la question :
A man om wharf 12 meters above the level of water is pulling a rope tide to a boat at the rate of 2 meters per minute. How fast is the boat approaching the wharf when there are 20 meters of the rope our. (with solution)
Penny Nom lui répond.
Problem solving 2014-09-08
hubert pose la question :
a car left the house and travelled at an average speed of 60 kph.how many minutes will it take for the car to reach the school which is 8 km away from the house
Penny Nom lui répond.
A car passing a bus 2014-08-24
Athish pose la question :
the driver of the car is travelling at 36 km/hr and spots a bus 80 m ahead of him after 1 hr the bus is 120 m behind the car what is the speed of the bus
Penny Nom lui répond.
Distance, speed and time 2014-08-13
abdel pose la question :
Mac walked to a park from the college at 5 km/h. 10 minutes later, Steve started riding his bike at 15 km/h to the same park to meet Mac. They arrive at the same time at the park. How far is the park from the college?
Tyler Wood lui répond.
Speed, distance, time 2014-08-13
Aarti pose la question :
a theif running at 8 km/hr is chased by a policeman whose speed is 10km/hr.if the thief is 100 m ahead the policeman then what will b time required for the policeman to catch the thief?
Tyler Wood lui répond.
A model of the sun and the Earth 2014-06-14
Lynn pose la question :
There is a model of the sun that is 2 1/2 inches in diameter. This is the only clue we have! How far away is the earth from this model?
Penny Nom lui répond.
What is the speed of the buses? 2014-05-18
musliu pose la question :
Two buses leave a bus station and travel in opposite direction from that same starting point.if the speed of one is twice the speed of the other and they are 240km apart at the end of 1h, what is the speed of the buses?
Penny Nom lui répond.
Travelling upstream and downstream 2014-05-12
Mohanad pose la question :
Howie Sorkin can travel 8 miles upstream in the same time it takes him to go 12 miles downstream. His boat goes 15 mph in still water. What is the rate of the current?
Penny Nom lui répond.
2 cars driving towards each other 2014-04-27
Joakim pose la question :
2 cars driving towards eachother , the distance between them is 162km. they meet after 2 hours. car A is driving with 4/5 of car B´s speed. what is the speed of each car...
Penny Nom lui répond.
What time was it when joe's brother passed him? 2014-04-25
Nathan pose la question :
joe left home in his bike at 10:00 am, traveling 21 km/h. At noon, his brother set out after him on his motorcycle, following the same route. if the motorcycle traveled at 63 km/h, what time was it when joe's brother passed him?
Penny Nom lui répond.
A speed word problem 2014-02-24
kiss pose la question :
Hank bicycles 5 km/h slower than Kelly. In the time that it takes Hank to bicycle 42 km, Kelly can bicycle 57 km. How fast does each bicyclist travel?
Penny Nom lui répond.
Two bicyclists traveled in opposite directions 2014-02-07
Susan pose la question :
Two bicyclists traveled in opposite directions, one at a rate of 8 km/hour and the other at a rate of 7 km per hour. In how many hours were they 45 km apart?
Penny Nom lui répond.
Walking up and down a hill 2014-02-06
flo pose la question :
michelle walks 4 km to the top of a hill at 3 km/h then immediately walks back down at an average speed of 5 km/h what is her average speed for the 8km walk
Penny Nom lui répond.
Radio direction finders 2014-01-09
Nathan pose la question :
Radio direction finders set up two points A and B, which are 2.5 miles apart on an east-west line. From A, it is found that the bearing of a signal from a radio transmitter is N36.33 degress E, while from B the bearing of the same signal is N53.67 degrees W. Find the distance of the transmitter from B.
Penny Nom lui répond.
Two tuna boats 2014-01-09
amanda pose la question :
Two tuna boats start from the same port at the same time, but they head in opposite directions. The faster boat travels 10 knots per hour faster than the slower boat. At the end of 8 hours, they were 272 nautical miles had each boat traveled by the end of the 8 hour period?
Penny Nom lui répond.
Distance from a point to a line 2013-12-28
Sue pose la question :
I need to find the distances from the west line on 1st Take Point and 2nd Take Point.
Thanks,
Sue

Penny Nom lui répond.
One train overtaking another 2013-11-11
kiran pose la question :
two trains of equal length are running in parallel tracks in the same direction with the speed of 60km/hr and 90km/hr respectively the latter completely crosses the former in 30 seconds the length of each train is in mtr
Penny Nom lui répond.
The average time per mile for a marathoner 2013-11-04
Peter pose la question :
a runner ran a 26.2 mile marathon in 2hours 8minutes and 24secounds. the question is, what was his average time for each mile that he ran?
Penny Nom lui répond.
A pool, a school, a park and home 2013-09-24
Selena pose la question :
The distance from the park to the pool is the same distance as the distance from your house to school. The school is between the pool and your house. Prove that the distance from the park to the school is the same distance from the pool to your house.
Robert Dawson lui répond.
What is the original speed? 2013-08-10
MJ pose la question :
If a truck increases its average speed by 10 km/h it can cover 60 km at the original speed in the same time that it can cover 80 km at the faster speed. What is the original speed?
Penny Nom lui répond.
Distance as a function of acceleration 2013-07-10
Tom pose la question :
If you start at a stoplight and your acceleration is 16t - t^2, how far have you gone after 8 seconds?
Penny Nom lui répond.
Diego and his dog 2013-07-09
William pose la question :
john went hunting and walked at a speed of 4 km/h. one hour later, Diego and his dog went to meet john with a speed of 6 km/h and the dog was running between john and diego until they meet up with a speed of 18 km/h. After Diego meets john, how much distance did the dog run?
Penny Nom lui répond.
The distance between 2 lines in 4D 2013-04-01
samane pose la question :
how can i measure the distance between 2 lines in 4D??
Chris Fisher lui répond.
A shortest distance problem 2013-03-28
LYNDELL pose la question :
I have a right triangle and know the length of all sides. How do I calculate the shortest distance from the vertex of the 90 degree angle to the hypotenuse?
Penny Nom lui répond.
6 miles in 28 minutes what's my average speed? 2013-03-05
lynda pose la question :
6 miles in 28 minutes what's my average speed?
Penny Nom lui répond.
An electron in a TV tube 2013-02-15
anu pose la question :
an electron in a TV tube is beamed horizontally at a speed of (50^6) m/sec. towards the face of a tube 40 cm away about how far will the electron drop before it hits? no information has been provided of initial height from where it is beamed.
Robert Dawson lui répond.
A journey of two parts 2013-02-06
Natalie pose la question :
Mr Lim drove at 70 km per hour for 1 hour and 30 minutes. He then drove another 55 km. if his average speed for the whole journey was 80km per hour, what was his speed for the 55 km journey?
Penny Nom lui répond.
How fast are we approaching each other? 2013-01-11
Heather pose la question :
If I am skating at 7 mph, and a car drives towards me at 15 mph, how fast are we approaching each other?
Penny Nom lui répond.
How fast is the distance between the aircraft and the car increasing? 2012-10-24
Steven pose la question :
At a certain instant an aircraft flying due east at 240 miles per hour passes directly over a car traveling due southeast at 60 miles per hour on a straight, level road. If the aircraft is flying at an altitude of .5mile, how fast is the distance between the aircraft and the car increasing 36 seconds after the aircraft passes directly over the car?
Penny Nom lui répond.
Two swimmers 2012-10-22
Emily pose la question :
Two swimmers start from opposite sides of the pool. Each swimmer swims the length of the pool and back at a constant rate. They pass each other for the first time 40 feet from one side of the pool and for the second time 45 feet from the other side of the pool. What is the length of the pool?
Penny Nom lui répond.
A plane travelling with the wind and against the wind 2012-08-03
Gwen pose la question :
The time of a plane trip of 450 miles, with the wind is 3/5 the time of the return trip against the wind. If the plane travels 120 mph in still air, what is the wind speed?
Penny Nom lui répond.
A cyclist a jogger and a fly 2012-06-04
Emd pose la question :
A cyclist & a jogger are 20 miles apart. Cyclist goes 20 mph & jogger 7mph towards each other. A fly starts on nose of cyclist & flies at 20 mph from cyclist to jogger & back & forth until they meet. How far has the fly travelled?
Penny Nom lui répond.
Romeo and Juliet live 40 miles apart 2012-05-18
Abigaíl pose la question :
Romeo and Juliet live 40 miles apart. Romeo jogs 8mph, while Juliet “fast walks” at 4mph. They leave their houses at the same time and journey toward each other.
a) How many hours after they start will they meet?
b) Approximately how many miles from Romeo’s house is their meeting point?

Penny Nom lui répond.
Math, time and rate 2012-05-18
Abigaíl pose la question :
Romeo and Juliet live 40 miles apart. Romeo jogs 8mph, while Juliet “fast walks” at 4mph. They leave their houses at the same time and journey toward each other.
a) How many hours after they start will they meet?
b) Approximately how many miles from Romeo’s house is their meeting point?

Penny Nom lui répond.
Cycling and running 2012-05-07
liz pose la question :
a biathlete travels 20 miles in 2.25 hours. She cycles part of the way at 12 mph and runs the rest at 5 mph. How far did she run?
Penny Nom lui répond.
The maximum distance from the vertex of a triangle 2012-05-02
David pose la question :
There are three towns A,B,and C, equi-distant apart. A car is 3 miles from town A, and 4 miles from town B. (ie, somehwere outside of the triangle which the three towns form) What is the maximum distance that the car can be from town A?
This was asked as quiz question in my local pub last Sunday.
The answer is 7. How do I prove it?
Best regards. David in Denton.

Robert Dawson and Chris Fisher lui répond.
Two cars approach a right-angled intersection 2012-04-10
Michael pose la question :
Two cars approach a right-angled intersection, one traveling south a 40km/h and the other west at 70km/h. When the faster car is 4km from the intersection and the other case if 3km from the intersection, how fast is the distance between the car cars changing?
Penny Nom lui répond.
How long will it take lee to catch up with jodie? 2012-03-21
kirsten pose la question :
for example, if jodie is on the bus travelling at 10 m.p.h and lee is walking at 4 m.p.h how long will it take lee to catch up with jodie?? what is this mathematical name for this
Harley Weston lui répond.
Margie threw a ball 2012-02-16
mary pose la question :
at 9:45 Margie threw a ball upwards while standing on a platform 35ft above the ground. The height after t seconds follows the equation: h(t)= -0.6t^2 +72t+35
a) what will be the maximum height of the ball?
b)how long will it take the ball reach its maximum height??

Harley Weston lui répond.
Jack and Kate set off in their cars ... 2012-02-13
akiri pose la question :
Jack and Kate set off in their cars from the same point to travel the same journey. Jack has a start of eight minutes before Katie sets off. If Jack travels at 50mph and Katie travels at 75mph, how many miles will be travelled when the two cars are level?
Penny Nom lui répond.
There is a police officer in pursuit of suspect 2012-02-01
Jay pose la question :
There is a police officer in pursuit of suspect. They suspect is driving on a straight road traveling at 79 mph, the officer is 233 yds away, traveling at 92 mph, the suspects car 5 ft long and the officers car is 5.3 ft long, how long will it take to have the front of the officers car, equal to the front of the suspects car down to the tenth of a second.
Harley Weston lui répond.
Two cars in a race 2012-01-30
Christine pose la question :
In a car race, the speed of one car is 120kph and the other car is 105 kph. If the faster car finished the race 20 mins before the slower one, what was the distance of the race? Thanks for the answer and the previous answer to my question.
Penny Nom lui répond.
Brian on his bike 2012-01-16
tiffany pose la question :
Brian rides his bike 0.29 miles per minute. If it takes him 22 minutes to ride his bike to his friend's house, how far away does his friend live?
Penny Nom lui répond.
Running 5 km 2012-01-12
Fayeann pose la question :
What amount of time will it take a person running 7 m/s to travel a distance of 5 km?
Penny Nom lui répond.
A straight line distance 2012-01-06
Margaret pose la question :
If you traveled 300 miles east and 275 miles north, how many miles would you save by going in a straight line?
Penny Nom lui répond.
Two trains passing each other 2011-12-07
Tamkeen pose la question :
two trains 245m and 315m long are travelling toward each other at 90km/h and 54km/h respectively on parallel lines . how long do the train take to pass one another train the time they meet each other?
Penny Nom lui répond.
Uniform acceleration 2011-12-06
Android pose la question :
At a certain instant, two cars A and B are 2000 ft apart. At this instant, car A is traveling at 15 miles/hr. and accelerating at 3 ft/s^2 while B is moving towards A at 30 miles/hr. and an acceleration of 2 ft/s^2.

Find the ff:
a.) The possible time of their collusion in minutes.
b.) The distance in ft. each has traveled before collusion.

Penny Nom lui répond.
Two boats 2011-11-30
Shayan pose la question :
A boat is traveling 20 miles per hour when it passes a lighthouse. another boat is traveling at 15 miles per hour when it passes a point. the lighthouse and the point are 175 miles apart. when will the boats pass each other?
Penny Nom lui répond.
The average speed for the whole journey 2011-10-30
Shahzad pose la question :
a train travels 68 Km at an average speed of 51Km/h. It then travels another 20Km at an average speed of 40Km/h before reaching its destination. Calculate the average speed for the whole journey?
Penny Nom lui répond.
What is the speed of the boat in still water? 2011-10-07
Hannah pose la question :
The speed of a stream is 3 mph. A boat travels 10 miles upstream in the same time it takes to travel 16 miles downstream. What is the speed of the boat in still water
Penny Nom lui répond.
Chuong and Hassan drive to work 2011-10-04
Dilshad pose la question :
Chuong and Hassan both drive 40 km from home to work each day. One day Chuong said to Hasssan, "If you drive home at your usual speed, I will average 40 kmph faster than you and arrive home in 20 minutes less time." Find Hassan's speed.
Penny Nom lui répond.
Driving to meet Mary 2011-08-24
Denise pose la question :
mary leaves St Paul traveling 2000 miles @ 55 MPH; John leaves LA traveling 2000 miles @ 45 MPH how many miles will John had traveled to meet mary?
Penny Nom lui répond.
Achilles and a turtle 2011-07-01
Jean pose la question :
Achilles and a turtle are having a race. The turtle starts 45m ahead of Achilles and Achilles is twice as fast as the turtle. If turtle runs at 1m/s,how far would the turtle have run before he is outrun by Achilles?
Penny Nom lui répond.
Two trains 2011-06-07
Lynn pose la question :
If the 1st train goes 60 mph and the 2nd train leaves 10 minutes later = at a speed of 70 mph, how long does it take to catch up with the 1st = train.
Penny Nom lui répond.
How many meters long should the race be? 2011-05-26
Lee pose la question :
Nathan can walk at a rate of two meters per second while David can easily go three-and-a-half meters per second. David offers Nathan a 45 meter head start. How many meters long should the race be in order for Nathan to win by a nose
Penny Nom lui répond.
How far is it from the control tower? 2011-04-11
Varun pose la question :
An aircraft is vertically above a point which is 10 kms west and 5 kms north of a control tower. if the aircraft is 4000 mts above the ground,how far is it from the control tower?
Penny Nom lui répond.
Two ships 2011-04-05
Gevork pose la question :
Ship A is sailing due south at 16 mph. At the same time, a second ship B, 32 miles south of A, is sailing due east at 12 mph.
(a) at what rate are they approaching or separating at the end of one hour?
(b) At what rate are they approaching or separating at the end of two hours?
(c) When do they cease to approach each other and how far apart are they at that instant.

Penny Nom lui répond.
Two boats 2011-03-29
Mamie pose la question :
Two speed boats leave the port of San Francisco traveling in opposite directions at the same time.One boat travels 8 knots per hour faster than the other.After one day's travel they are 1,920 nautical miles apart.What are the speeds of the two boats.
Penny Nom lui répond.
Points with distance 5 from the point (-2, -1) 2011-01-19
Alexa pose la question :
Find all points having a x-coordinate of 2 whose distance from the point (-2, -1) is 5.
Penny Nom lui répond.
What is its speed in miles per hour? 2011-01-06
Miriam pose la question :
An airliner travels 125miles in 15minutes. What is its speed in miles per hour?
Penny Nom lui répond.
80 miles in 40 minutes 2010-12-08
james pose la question :
i travel 8o miles in 40 minutes. how fast am i going in mph
Penny Nom lui répond.
Can determine if it is scalene, isosceles, or equilateral 2010-12-01
Jessie pose la question :
find the measures of the sides of triangle KPL and classify each triangle by its sides. my first problem would be K(-3,2) P(2,1) L(-2,-3) ...The three points they give you are the vertices of the triangle and you need to match them up. Draw the triangle and write in the vertices and the related point with the vertex. You will then do the distance formula three times to find the distance of all three sides. Once you have the three sides you can determine if it is scalene, isosceles, or equilateral...using the distance formula how do i solve this?
Penny Nom lui répond.
What is its speed in still air? 2010-11-28
Shelby pose la question :
An Airplane flies a certain distance in 3 hours going WITH a 40km/hr wind. It travels the same distance in 5 hours when going against the wind. What is it's speed and how long would it take to travel the same distance in still air? Distance = speed x time
Penny Nom lui répond.
How long will you and your friend be able to talk? 2010-11-23
beket pose la question :
you and your friend leave your home town at the same time your friend travels by train 45 mph directly east while you travel by train 50 mph going directly south you are talking on cell phone but you plan charges extra if the phones are 100 miles apart. How long will you and your friend be able to talk before the charges increase?
Penny Nom lui répond.
A train passes a car 2010-10-24
Mary pose la question :
A train, whose speed is 75 mph, takes 3 minutes to pass a car that is going 60 mph in the same direction. How long is the train?
Stephen La Rocque lui répond.
What are the speeds of the boats? 2010-10-21
Adori pose la question :
Two boats leave the port of San Francisco traveling in opposite directions at the same time. One boat travels 8 knots per hour faster than the other. After one day's travel they are 1920 nautical miles apart. What are the speeds of the boats?
Penny Nom lui répond.
John and Mary are 200 miles apart 2010-10-20
Sarah pose la question :
two people, john and mary, are 200 miles apart and leave at the same time to meet. They are driving toward each other at constant rate on the same straight road. John is traveling at 45 mph and Mary is traveling at 35 mph. When they meet, how many miles will they be from john's house?
Penny Nom lui répond.
A commuter airline between two cities 2010-10-19
Adori pose la question :
An airline runs a commuter between two cities that are 720 miles apart. If the average speed of the planes is increased by 40 miles per hour, the travel time is decreased An airline runs a commuter between two cities that are 720 miles apart. If the average speed of the planes is increased by 40 miles per hour, the travel time is decreased by 12 minutes. What airspeed is required to obtain this decrease in travel time?
Penny Nom lui répond.
Two jets leave denver at 9 am. 2010-10-15
Carl pose la question :
two jets leave denver at 9 am. One flying east at a speed of 50 km per hour greater than the other which is traveling west. At 11 am the planes are 2500 km apart. Find their speeds.
Stephen La Rocque lui répond.
Electronic cars around a circular track 2010-10-11
Taylor pose la question :
Cory and Melissa are racing electronic cars around a circular track. They begin at the same time going in the same direction. Cory's car completes a revolution in 35 secs, while Melissa's car completes a revolution in 30 secs. How long will it take them before both cars reach the starting point again simultaneously?
Stephen La Rocque and Penny Nom lui répond.
Two cars 2010-09-30
Amanda pose la question :
Two cars, 142 miles apart, start moving towards each other at the same time. One is moving 3 times as fast as the other. If they meet 1.7 hrs later, find the average speed of the slower car in miles per hour?
Penny Nom lui répond.
The distance between the origin and a moving point 2010-09-24
Norma pose la question :
I am having problems with this question find the rate of change of the distance between the origin and a moving point on the graph of the function below if dx/dt=5 cm/sec y=x^2+2
Penny Nom lui répond.
What is the average speed? 2010-09-21
Cindy pose la question :
A boat travels downstream m nautical miles at d knots. It travels upstream m nautical miles at u knots. What is the average speed for the entire trip?
Penny Nom lui répond.
40 mph for 6 minutes 2010-09-20
Andy pose la question :
If i was traveling at 40 mph for 6 minutes, what is my distance in miles?
Penny Nom lui répond.
Driving north, east and west 2010-09-02
dane pose la question :
suppose that you drive 27 miles north, 31 miles east, 45 miles west, and 14 miles east. how far are you from your starting point?
Penny Nom lui répond.
Three cars 2010-08-30
Anil pose la question :
3 cars are moving at speed of 4 kmph,5.5 kmph and 8 kmph in a circular track.The circular track has a distance of 11 km. What is the time taken for all the 3 cars to meet at the starting point ?
Stephen La Rocque lui répond.
Running 100 km 2010-08-12
thomas pose la question :
Another athlete runs 8 laps every day on the same 400m running track. How many days will it take him to run a total of 100 km?
Robert Dawson lui répond.
Two cars on a circular track 2010-08-12
david pose la question :
If two cars starts to drive at point 1 and go in a circle when will they meet? (one cars speed is faster the other ) all I need is a formula
Tyler Wood lui répond.
How fast is the second car taveling? 2010-07-26
Jeff pose la question :
A car is traveling 75 mph. It takes 12 miles to overtake a second car that was .5 mile ahead. How fast is the second car taveling?
Stephen La Rocque lui répond.
How much longer will it take to reach Toronto 2010-07-22
Rachelle pose la question :
We are taking a trip from Ottawa, ON to Toronto, ON. The total trip is 150 kms and will take us 4.5 hours. We have already driven 108 kms and there is still 42 kms left to go. If we are travelling 110 kms/hr, how much longer will it take to reach Toronto?
Penny Nom lui répond.
Pursuing Car 1 2010-07-13
Mark pose la question :
Car 1 is traveling down the road at 50mph and passes Car 2 is sitting on the side of the road. Car 2 needs to catch Car 1 one half mile down the road. How fast must Car 2 drive to catch Car 1 if Car 2 waits 10 seconds before pursuing Car 1?
Robert Dawson lui répond.
Half a mile at 50 mph 2010-07-13
Mark pose la question :
How long will it take a car to travel 1/2 mile at 50 mph?
Robert Dawson lui répond.
Going to the bike shop 2010-06-07
Omi pose la question :
Marie rode her bicycle from her home to the bicycle shop in town and then walked back home. If she averaged 6 miles per hour riding and 3 miles per hour walking, how far is it from her home to the bicycle shop if her total travel time was 1 hour?
Penny Nom lui répond.
What is the distance from A to C via B? 2010-05-24
vivianne pose la question :
The distance from A to B is d km and that from B to C is x km. if a bus maintains an average speed of 50km/hr between A and B and 60km/hr between B and C, it takes 3 hours to travel from A to C. If it maintains 60km/hr between A and B and 50km/hr between B and C, the journey takes 8 minutes less. What is the distance from A to C via B?
Penny Nom lui répond.
When will the second truck catch up to the first? 2010-05-22
Josie pose la question :
At 9:00 a.m. a truck leaves the truck yard and travels west at a rate of 45 mi/hr. At 11:00 a.m., a second truck leaves along the same route, travelling at 60 mi/hr. When will the second truck catch up to the first?
Tyler Wood lui répond.
How far am I from the starting point? 2010-05-18
jilayna pose la question :
if i walk 5 miles north, 7 miles east, and 3 miles north again.to the nearest tenth of a mile ,how far,in a straight line, am i from my starting point
Penny Nom lui répond.
Sammy and his motorboat 2010-05-11
Jordan pose la question :
Sammy owns a motorboat that travels 4 miles/hour in still water. It goes 12 miles upstream and 12 miles back again (downstream) in a total of 8 hours. Find the speed of the current of the river.
Penny Nom lui répond.
Line of sight 2010-05-06
David pose la question :
I live in St. Joseph, Michigan and there is an ongoing argument regarding line-of-sight over the horizon.

Standing on a 200 foot high bluff here, people swear they can see the top of the Willis (nee Sears) Tower in Chicago, which is about 1653 feet high.

It is my contention that this is actually a "refracted reflection" and not direct-line-of-sight.

So, to settle the argument, I'd sure like some simple explanation for this, even if-and I hope not-I am incorrect.

David

Harley Weston lui répond.
40 miles at 50mph 2010-05-02
gill pose la question :
if a car travelled 40miles at 50mph, how long would it take?
Penny Nom lui répond.
When are the cars exactly 40 miles apart? 2010-05-01
Maryanne pose la question :
A car traveling east at 45 mph passes a certain intersection at 3pm. Another car traveling north at 60mph passes the same intersection 25 minutes later. To the nearest minute, figure out when the cars are exactly 40 miles apart.
Penny Nom lui répond.
If (x, 4) is equidistant from (5, -2) and (3, 4), find x. 2010-04-21
abeth pose la question :
If (x, 4) is equidistant from (5, -2) and (3, 4), find x.
Find the point on the y - axis that is equidistant from (-4, -2) and (3, 1).

Penny Nom lui répond.
What is the speed of the current? 2010-03-17
Carl pose la question :
If you can row 3 mph in still water and paddle 3 miles upstream and return in 3.6 hours then what is the speed of the current?
Penny Nom lui répond.
The distance travelled by a minute hand 2010-03-06
Patric pose la question :
How much distance will the minutes hand of length 14mm of a clock cover in moving from 5 to 10?
Penny Nom lui répond.
At what time would Joan catch Jo? 2010-03-04
Rusty pose la question :
If Jo left his house at 6:30am traveling at 5mph and Joan left the same house 7:00am traveling at 8mph, at what time would Joan catch Jo?
Penny Nom lui répond.
The vertices of an equilateral triangle 2010-02-19
Emma pose la question :
If two of the vertices of an equilateral triangle are (2,1) and (6,5), what are the two possible coordinates of the third side of the triangle? Answer in radical form.
Tyler Wood lui répond.
The center of a rectangular room 2010-02-16
Diana pose la question :
Consider a rectangular room, 15 feet wide, 30 feet long and 12 feet high. What is the exact distance from any of the 8 corners of the room and its geometric center? Can you write a generic formula for such a distance? And if we keep the same proportions on all dimensions, can you write an expression for the same distance as a function of the floor perimeter?
Penny Nom lui répond.
The distance from a chord to an arc 2010-02-11
matt pose la question :
hello, I have to layout a radius without being able to pull from the center my radius is 3819.53 feet and i have a chord length of 275.59 feet if i broke that up into 25.05 feet sections how would i calculate the lengths from my chord to that radius?
Robert Dawson lui répond.
A decrease in travel time 2010-01-30
Mike pose la question :
if a 100 mile trip averages 50 miles per hour, how much distance does one need to travel at 90 miles per hour to decrease travel time by 10%
Stephen La Rocque lui répond.
A tunnel from Toronto to Montreal 2010-01-25
Dave pose la question :
I want to make a tunnel from Toronto to Montreal (for example)

Something like this http://mathcentral.uregina.ca/QQ/database/QQ.09.09/h/grant1.html
-------------
My coordinates are 45.442455,-73.861340 (Montreal) and 43.442455, -79.861340 (Toronto)

I need to know how to find arc distance, chord distance and radius What websites can i find for this subject Google has many but they are useless (blah blah) websites
LOL
Thanks

Chris Fisher and Robert Dawson lui répond.
How long will it take to go 1 mile at 80 mph? 2010-01-19
Susann pose la question :
How long will it take to go 1 mile at 80 mph?
Penny Nom lui répond.
How fast am I walking? 2010-01-10
KEVIN pose la question :
IF I WALK 3 MILES IN 28 MINUTES, HOW FAST AM I WALKING?
Penny Nom lui répond.
Gail and Bill drove to the beach 2010-01-10
Nicole pose la question :
Gail and Bill drove to the beach at an average speed of 50mph. They return home over the same road at an average speed of 55mph. The tip took 30 min less time. How far is the beach from their house?
Stephen La Rocque lui répond.
... the original speed of the car was? 2009-12-08
venkatesh pose la question :
A car travels a distance of 840 miles at a uniform speed if the speed of the car is increased 10 m/h more ,it takes two hours less to cover the same distance ,the original speed of the car was?
options:75 mh,65 m/h,60 m/h,55 m/h,45 m/h .

Claude Tardif lui répond.
Walking at 4/5 of his usual speed 2009-12-05
venkatesh pose la question :
walking at 4/5 of his usual speed a man is 10 minutes too late .find his usual time.
Penny Nom lui répond.
At what rate are the people moving apart? 2009-11-01
saira pose la question :
A man starts walking north at 4 ft/s from a point P. 5 minutes later a woman starts walking south at 5 ft/s from a point 500 ft due east of P. At what rate are the people moving apart 15 minute after the woman starts walking ?
Harley Weston lui répond.
How far will it travel in 45 mins? 2009-10-27
maison pose la question :
I'm stuck on the formula i dont remeber what it is can you help me out a car is traveling 80km/h how far will it travel in 45 mins
Robert Dawson lui répond.
Two jets are traveling towards each other 2009-10-05
jake pose la question :
two jets are traveling towards each other and are 4000 km apart. the rate of one jet is 100 km/h faster than the rate of the other. if the jets pass each other after 2.5 hrs what is the rate of speed of the faster jet?
Penny Nom lui répond.
How long (distance)did it take to stop? 2009-09-30
mary pose la question :
a car travelling at 50km/h stops in 4 seconds.how long (distance)did it take to stop?
Harley Weston lui répond.
How fast am i going? 2009-09-28
ron pose la question :
how fast am i going if i drive 40 miles in 20 minutes...what is the formula for figuring this out.
Leeanne Boehm lui répond.
How long would it take the students to arrive at their campsite 2009-09-18
amanda pose la question :
..."A group of 5th grade student in New Zealand are going camping. They will hike from Wellingto to Ruapehu. Then they will follow a trail for another 1/2 mile to their campsite." Ok, 1 mile equals 5,280 feet. The class decided one step length is equal to 15 inches and there are 85 steps in 1 minute. Now for the question: About how long would it take the students to arrive at their campsite, if they don't make any stops???
Robert Dawson lui répond.
Average speed 2009-09-11
john pose la question :
Sally travels by car from one city to another. She drives for 20.0 min at 68.0 km/h, 40.0 min at 37.0 km/h, and 51.0 min at 77.0 km/h, and she spends 12.0 min eating lunch and buying gas.

What is the average speed for the trip?

Penny Nom lui répond.
Paddling downstream 2009-09-04
Nicole pose la question :
You head downstream on a river in a canoe. You can paddle at 6 km/h and the river is flowing at 2.4 km/h. How far downstream will you be in 55 minutes?
Penny Nom lui répond.
The distance traveled on a bike 2009-08-28
Dennis pose la question :
I would like to calculate the distance traveled on a bike based on the size of the tire and on the number of revolutions per minute. This is based on the rider traveling at a constant speed.
Stephen La Rocque lui répond.
Two cars 2009-08-09
Jayna pose la question :
If a car was traveling 20mph east and another car was traveling 30mph west, assuming they were 300 miles apart, at what point would they collide at the center?
Penny Nom lui répond.
A boat goes up stream 30 miles and ... 2009-06-29
Mohsin pose la question :
A boat goes up stream 30 miles and down stream 44 miles in 10 hours. Again it goes up stream 40 miles and down stream 55 miles in 13 hours. Find the rates of the stream and of the boat.

I am confused and unable to get an answer. Please help.
Thanks

Robert Dawson lui répond.
A train crosses a tunnel 2009-06-25
Sabrina pose la question :
A goods train of length one and half kilometres, is moving at a speed of 27km/hr. find the time taken by it to cross a tunnel of length seven and half kilometres
Penny Nom lui répond.
The Pythagorean theorem 2009-06-24
supreet pose la question :
What are some real-world applications of the Pythagorean theorem?
and
How are the Pythagorean theorem and the distance formula related?

Harley Weston lui répond.
Driving to school and back 2009-05-17
marylyne pose la question :
suppose you are late for school and you drive from your house at a constant rate of 70 mph.when class is over, you drive home at a more leisurely 50mph. what is your average speed?
Penny Nom lui répond.
What was her rate of speed? 2009-05-06
Stephanie pose la question :
beth paddled a canoe to a picnic spot in the river in 2 hours. she traveled up the stream back to the original spot in three hours. the current was two miles per hour. What was her rate of speed?
Robert Dawson and Stephen La Rocque lui répond.
Two airplanes are 300 miles apart 2009-04-22
afzalsultan pose la question :
Two airplanes are 300 miles apart and flying directly towards each other.One is flying at 200 miles per hour, and the other at 160 miles per hour.How long will it take for the two planes to meet
Robert Dawson lui répond.
Passing three cars 2009-04-16
Larry pose la question :
If 3 cars are going 50 mph, and a fourth car pass the first 3 cars in 200 feet, how fast is the fourth car going?
Stephen La Rocque lui répond.
A man travels a total of 8km in 6 hours 2009-04-10
Kieran pose la question :
Hello!

I was wondering if you could help me with this question! Thank you

A man travels a total of 8km in 6 hours

if his speed was xkm/4hours in the first stage
then his speed was 8-x/2hours in the second part.

If the average speed for the first leg of the journey was 1.1km/h faster than the second part: find x

Penny Nom lui répond.
How many miles per hour was it traveling? 2009-04-04
Regina pose la question :
a car traveled 16 miles in 30 minutes. How many miles per hour was it traveling?
Penny Nom lui répond.
310,000 cubic yards of concrete 2009-03-31
Mary pose la question :
I am interested in getting a good, general analogy for 310,000 cubic yards of concrete - ideally as a length (miles) or distance between two US cities. Thanks!
Penny Nom lui répond.
A trip at two different speeds 2009-03-28
A student pose la question :
Good afternoon!

An automobile travels 4 hours at an average speed of 42MPH. How much longer must the truck travel at an average speed of 55MPH so the average speed for the total trip will be 50MPH?

Thank you for your assistance!

Penny Nom lui répond.
The speed of a tire in revolutions per minute 2009-03-28
Jules pose la question :
Suppose that a tire on a car has an outer diameter of 2,5 feet. How many revolutions per minute does that tire make when the car is travelling 60 miles per hour? (hint:first find the angular velocity in radians per minute.)
Harley Weston lui répond.
Subdividing a four-sided lot 2009-03-27
kannan pose la question :
i have a 1.5 acre land having four sides
A-B=64.8 meters
B-C=94.2 meters
C-D=54.4 meters
D-A=127.2 meters
angle at D is 90
the side AB (frontage)is road facing i want to split the plot in to two halves having same almost area and almost equal frontage, kindly help me, if possible explain with drawing.

Regards
Kannan

Harley Weston lui répond.
A 5 ounce object traveling at 60 mph 2009-03-27
James pose la question :
if a 5 ounce object traveling at 60 mph at 100 feet above the ground, how far will it travel forward before hitting the ground.
Robert Dawson lui répond.
Two racers going around a track 2009-02-26
larisa pose la question :
One racer makes a complete trip around the track every 28 seconds, while the other racer completes a trip around the track every minute. How many times will the first racer pass the second racer in 30 minutes?
Robert Dawson lui répond.
Fred in his canoe 2009-02-21
Susan pose la question :
Fred paddled for 4 hours with a 7 km/hr current to reach a campsite. The return trip against the same current took 9 hr. Find the speed of Fred's canoe in still water. (Remember to include correct units)
Penny Nom lui répond.
How long will it take Jake to catch up? 2009-02-20
Rebecca pose la question :
John is walking 2 miles per hour. Jake leaves home 15 minutes later and is walking 5 miles per hour . How long will it take Jake to catch up ?
Penny Nom lui répond.
Joggong in opposite directions 2009-02-19
Mallory pose la question :
Emma and her mother jog along a mile-long circular path in opposite directions. They begin at the same place and time. Emma jogs at a pace of 4 mi/h, and her mother runs at 6 mi/h. In how many minutes will they meet?
Robert Dawson lui répond.
Catching up to the car ahead 2009-02-06
Ashley pose la question :
Car A passes Car B on a freeway. The driver of Car B decides to speed up to 75 mph and catch Car A, whose driver is maintaining a constant speed. Looking ahead, the driver of Car B sees Car A go under an overpass one-qarter mile up the road. Exactly six minutes later, Car B catches Car A. How fast was the car going?
Penny Nom lui répond.
How long will it take to make 50 miles? 2009-01-26
Tamara pose la question :
An object is traveling at a speed of 45 km/minute. How long will it take to make 50 miles?
Robert Dawson and Stephen La Rocque lui répond.
A tortoise and a hare 2009-01-20
jenna pose la question :
A tortoise can run with a speed of 0.14 m/s, and a hare can run 20 times as fast. In a race, they both start at the same time, but the hare stops to rest for 1.0 minutes. The tortoise wins by a shell (25 cm).
(a) How long does the race take?

(b) What is the length of the race?

Stephen La Rocque lui répond.
Parallel distances from arc of circle to its chord 2009-01-16
Roger pose la question :
Give the length of a chord of a circle and the height of the arc, how do I find the lengths of equally spaced parallel lines drawn from the chord to the arc. (Think of the lengths of vertical slats in an arch-topped bed head board.)
Chris Fisher and Stephen La Rocque lui répond.
Two trains 2009-01-12
Shanise pose la question :
If train A leaves the train station at noon traveling 45mph and train B leaves the train station at 1pm traveling 65mph, what time will the trains meet?
Robert Dawson lui répond.
How far are the boats apart? 2008-11-14
dom pose la question :
Two boats leave port at the same time. They leave at 150 degree angle. One boat travels at 10mph and the other at 20mph. After two hours how far are the boats apart?
Penny Nom lui répond.
A circle tangent to a line and with its centre on another line 2008-11-01
liza pose la question :
Find the equation of the circle of radius squareroot 26 tangent to the line 5x+y=13 and having its center on the line 3x+y+7=0.
Chris Fisher lui répond.
The speed of the boat and the river 2008-10-28
Jenn pose la question :
On the Amazon River in Brazil, a boat goes 50 miles upstream in 3 hours, later the boat returns to the starting point in 2 hours. What is the speed of the boat in still water and what is the current speed in this part of the Amazon?
Penny Nom lui répond.
Travelling home o the train 2008-10-18
nadha pose la question :
MELISSA reached the railway station at 9.30am.The distance between the railway station and her hometown was 720 km.At what time would she reach her hometown if the train travelled at an average speed of 120 km/h?
Penny Nom lui répond.
If you are driving 40mph, how long does it take to go 2.5 miles? 2008-10-18
Nathan pose la question :
If you are driving 40mph, how long does it take to go 2.5 miles?
Penny Nom lui répond.
Two planes flying in opposite directions 2008-10-16
samantha pose la question :
i don't understand how to do this problem.two jets leave denver at 9:00 am one flying at a speed 50 km/h greater than the other, which is traveling west. at 11:00 am the planes are 2500 km apart. find their speeds.
Penny Nom lui répond.
5 units from (1,2) and 5 units from y-axis 2008-09-26
Shaun pose la question :
Find the points (x,y) in the plane that are 5 units from (1,2) and 5 units from y-axis. I am more interested in the approach, in general terms, than the numerical values.
Penny Nom lui répond.
Distance, time and rate 2008-09-11
Pauline pose la question :
During the first part of a trip, a canoeist travels 100 miles at a certain speed. The canoeist travels 25 miles on the second part of the trip at a speed 5 mph slower. The total time for the trip is 5 hrs. What was the speed on each part of the trip?
Penny Nom lui répond.
Running in opposite directions 2008-07-29
maame pose la question :
if i run six miles per hour and my friend runs four miles per hour and we both run for two hours in opposite directions how many miles apart will we be after the two hours?
Janice Cotcher and Penny Nom lui répond.
Braking Distance Relationship 2008-07-23
Mr.Adjetey pose la question :
you are travelling at 30km/h.According to the rule of thumb,the braking distance is 9 metres when braking normally.How long is the braking distance under the same conditions when travelling at 60km/h?
Janice Cotcher lui répond.
Going from 45 mph to 35 mph 2008-07-09
Terry pose la question :
How long (distance - feet AND time) will it take a car traveling at 45 mph to slow down to a speed of 35 mph?
Harley Weston lui répond.
Two trains 2008-07-07
Elisha pose la question :
Trains at each end of the 50. km long Eurotunnel under the English Channel start at the same time into the tunnel. Find their speeds if the train from France travels 8. km/h faster than the train from England and they pass in 17 minutes.
Janice Cotcher and Penny Nom lui répond.
A boat travels 20 kms upstream in 6 hrs ... 2008-07-07
vidya pose la question :
A boat travels 20 kms upstream in 6 hrs and 18 kms downstream in 4 hrs. Find the speed of the boat in still water and the speed of the water current?
Penny Nom lui répond.
How far from each other will they be? 2008-06-18
kerstin pose la question :
a women jogging at 6 mi/h passes a men biking in the opposite direction at 12 mi/h. if the maintain their speeds, how far from each other will they be 10 minutes after passing?
Stephen La Rocque lui répond.
The length of a shadow 2008-05-27
Simon pose la question :
A figure skater is directly beneath a spotlight 10 m above the ice. IF she skates away from the light at a rate of 6m/s and the spot follows her, how fast is her shadow's head moving when she is 8m from her starting point? The skater is (almost) 1.6m tall with her skates on.
Stephen La Rocque and Harley Weston lui répond.
55 mi/h for 4 h 2008-05-21
brenda pose la question :
mary drove her car at 55 mi/h for 4 h. Use the formula d = rt (where d is the distance traveled, r is the rate of travel and t is the time traveled) to determine how far mary traveled.
Penny Nom lui répond.
A crate is launched from an airplane 2008-05-10
Michelle pose la question :
A crate is launched from an airplane, 75 feet above the ocean, with an initial vertical velocity of 60 feet per second. How many seconds will it take for the crate to hit the water? Round to the nearest hundredth.
Harley Weston lui répond.
How far is it from the top to the bottom of the mountain? 2008-05-09
Matthew pose la question :
A ski lift carries a skier up a slope at a rate of 2 miles per hour. Following the same path down the mountain, the hiker has a rate of 4 miles per hour. If the round trip took 3 hours, how far is it from the top to the bottom of the mountain?
Penny Nom lui répond.
5 miles per hour for 30 minutes 2008-04-29
Joshua pose la question :
A boat travels at a constant rate of 5 miles per hour for 30 minutes. How far does the boat go in that time?
Penny Nom lui répond.
Driving home from work 2008-04-25
brittanygrant pose la question :
brittany house is 37 miles from his job. He leaves at 6:25pm, and drives 49 miles per hour. what time will he get beck home?
Penny Nom lui répond.
45 miles at 50 mph 2008-04-18
Willie pose la question :
If you travel at 50 mph, how long does it take to go 45 miles?
Penny Nom lui répond.
Jill and Matt run on a 400 meter long oval track 2008-04-11
jamie pose la question :
Jill and Matt run on a 400 meter long oval track. Jill and Matt each run 10 laps daily and both run in the same lane. One day Jill and Matt began at the same point, but ran around the track in opposite directions. Jill ran at a constant speed that was 2 meters per second faster than matts constant speed. Jill passed Matt for the first time in 40 seconds. Jill ran at a constant rate of how many meters per second?
Penny Nom lui répond.
Two trains left the city at the same time 2008-04-11
J pose la question :
Two trains left the city at the same time, traveling in opposite directions. The eastbound train travels for ten hours and the westbound train travels for 5 hours. They are now 1300 km apart. The westbound train's rate is 20 km/hr faster than the eastbound train. Find the speed of each train.
Penny Nom lui répond.
A river boat 2008-04-09
jessica pose la question :
heres a crazy riddle a river boat that travels 12 mph in still water makes a pleasure trip to a city upstream and back in 3 hours. If the city is 10 miles aways, what is the rate of the current
Stephen La Rocque lui répond.
The shortest distance from a point to a line 2008-04-03
Katherine pose la question :
How do I find the shortest distance from the point (3,5) to the line x = -2
Stephen La Rocque lui répond.
Distance seen 2008-03-18
Nev pose la question :
formule: Distance Seen
S = 1.225 x square root of H
S = Distance seen in Miles
H = Height in Feet


What dose 1.225 Relate To ?

Stephen La Rocque lui répond.
A train and a boat 2008-03-15
Sabrina pose la question :
A railroad bridge is 20m above, and at right angles to, a river. A person in a train travelling at 60 km/h passes over the centre of the bridge at the same instant that a person in a motorboat travelling at 20km/h passes under the centre of the bridge. How fast are the two people separating 10s later?
Harley Weston lui répond.
Two points moving on a straight line 2008-03-06
laura pose la question :
Particle A travels at constant speed of 1.0ms-1 in straight line, passing particle B, at which time particle B beings traveling with constant acceleration of 0.2ms-2 until reaching Particle A.
What equations represent the displacement of particle A and particle B measure from the point they first pass?
How long does it take for particle B to catch up with particle A?
What is the speed of particle B when reaching particle A?
What distance have both particles traveled from where they first pass to where they meet again?
Calculate the displacement of both particle A and B at 2 second intervals between t=0s and t=12s?

Stephen La Rocque and Penny Nom lui répond.
A dog and a fire hydrant 2008-03-06
Brittany pose la question :
A bulldog is walking east along Main St. at a speed of 4 miles per hour. He wants to get to a fire hydrant on a parallel street. Initially, the bearing to the hydrant is south 62 degrees east. After 20 minutes, the bearing is south 41 degrees east. If the bulldog continues his walk, what is the closest he will be to the hydrant?
Stephen La Rocque lui répond.
What point on the graph y = e^x is closest to the origin? 2008-03-03
elvina pose la question :
What point on the graph y = e^x is closest to the origin? Justify your answer.
Stephen La Rocque lui répond.
A package of supplies is dropped from a plane 2008-02-29
beth pose la question :
An airplane flies west at a speed of 200m/s. A package of supplies is dropped from the plane to some campers. if the plane is at an altitude of 1000meters, how far from the campers should the package be dropped to land near them? ignore wind resistance.
Stephen La Rocque lui répond.
A ball bearing is placed on an inclined plane 2008-02-15
Leah pose la question :
A ball bearing is placed on an inclined plane and begins to roll. The angle of elevation of the plane is x. The distance (in meters) that the ball bearing rolls in t seconds is s(t) = 4.9(sin x)t^2. What is the speed of the ball bearing, and what value of x will produce the maximum speed at a particular time?
Penny Nom lui répond.
The distance around a building 2008-02-06
olivia pose la question :
If you walk around a building that is 102,869 sq ft, how many miles is that?
Penny Nom lui répond.
Two cars are on a collision course 2008-02-06
Danielle pose la question :
Two cars are on a collision course, heading straight towards each other. One car is traveling 45 miles per hour and the other is traveling 75 miles per hour. How far apart will the two cars be one minute before they collide.
Penny Nom lui répond.
How fast does each travel? 2008-02-05
kRYSTAL pose la question :
May rides her bike the same distance that leah walks. May rides her bike 10km/h faster than leah walks. Its takes May 1 hour and Leah 3 hours to travel the sam distance, how fast does each travel?
Penny Nom lui répond.
Driving from Mathville to Bioville 2008-02-01
Ariel pose la question :
Mahtab took hours to drive from Mathville to Bioville, a total of 485 km. She drove part by highway at 80 km/h and part by slow roads at 30 km/h. How many hours did she drive each type of road?
Penny Nom lui répond.
2 km at 5.00 m/s 2008-01-29
Stephanie pose la question :
How much time does it take for a student running at an average speed of 5.00 m/s to cover a distance of 2.00 km?
Penny Nom lui répond.
How far from the corner will the police catch the car? 2008-01-27
Joel pose la question :
A car is going down the road at a speed of 90km/h in a 50km/h zone. As the car passes a corner, a police cruiser sitting there notices it. Five seconds later the cruiser begins accelerating at 5.0m/s squared. Assuming that he is able to maintain this acceleration, how far from the corner will the police catch the car? How fast will the cruiser be going?
Stephen La Rocque lui répond.
Two bikers race on a circular track 2008-01-17
Abby pose la question :
Two bikers race on a circular track. Biker A can circle the track in 8 minutes, and Biker B can circle the track in 6 minutes. From the start of the race, how many minutes will it be before Biker B overtakes Biker A?
Stephen La Rocque and Penny Nom lui répond.
Driving towards each other 2008-01-16
Shanda pose la question :
Paul and Charlene are 420 miles apart. They start toward each other with Paul driving 16 miles per hour faster than Charlene. They meet in 5 hours. Find Charlene's speed.
Stephen La Rocque lui répond.
The distance back to school 2008-01-16
priya pose la question :
a boy starts travelling from his house to his school. He travels 1 km east and then 2km north and then 1 km East and 1km North and then 1 km east and then 1 km North. find out the shortest distance for him to reach his shool?
Harley Weston lui répond.
How fast does Kim paddle in still water? 2008-01-07
Fran pose la question :
Kim paddled a canoe 10 km upstream and then paddled back to his starting point. If the rate of the current was 2 km/h that day and the whole trip took 3.75 h, how fast does Kim paddle in still water?
Penny Nom lui répond.
What is the speed of the plane in still air? 2008-01-05
oscar pose la question :
A plane flies 400 miles with the wind and 340 miles against the wind in the same length of time. If the speed of the wind is 24mph, what is the speed of the plane in still air?
Penny Nom lui répond.
The shortest distance to a line 2008-01-04
nana pose la question :
3y+4x-12=0 is the equation of the line AB on a graph......the line AB joins both y and x axises together.....point A is on y axis and its value is 3....point B is on x axis and its value is 4.....Question : from point O(0,0).find the point ont the line AB
Stephen La Rocque lui répond.
Sally, Charlie and Snoopy in a race 2007-12-29
Marie pose la question :
Sally and Charlie are having a race. Charlie gets a 900 foot lead and runs 8 inches per second. Sally begins at the starting line and runs at a rate of 5 ft per second. Charlie's dog is also in the race. Snoopy starts 1100 feet ahead of Sally and runs toward the starting line at a rate of 1 foot per second.

When will Charlie and Snoopy past each other and how far will they be from the starting line?

Penny Nom lui répond.
Two cars drive in opposite directions 2007-12-23
dale pose la question :
2 cars starting from the same point in opposite direction on a straight highway drove 6 miles then turn left and drove 8 miles. How far apart are the cars?
Penny Nom lui répond.
Two cars going in opposite directions 2007-11-25
alexa pose la question :
two cars leave town at the same time going opposite directions. one of them travels at 55 mph and the other at 65 mph. in how many hours will they be 150 miles apart?
Penny Nom lui répond.
Stopping distance and speed 2007-11-11
Joanna pose la question :
The algebraic relation d=0.0056^2 ++ 0.14s models the relation between a vehicle's stopping distance d, in metres, and its speed s, in kilometres per hour.
(a) What is the fastest you could drive and still be able to stop within 80 m?
(b) What is the stopping distance for a car travelling at 120 km/h?
(c) Estimate the length of an average car. How many car lengths does the the stopping distance in (b) correspond to?

Stephen La Rocque lui répond.
Two cars 2007-11-04
Jalisa pose la question :
If Car "A" is traveling 50 miles per hour and car "B" is traveling 60 miles per hour, how long will it take car "B" to catch up to car "A" if car "A" had a 15 mile head start.
Penny Nom lui répond.
A car traveled 175m at certain speed 2007-10-28
abdi pose la question :
A car traveled 175m at certain speed. if the speed had been 20 mph faster, the trip could have been made in 1 hr less time. find the speed?
Stephen La Rocque lui répond.
How to solve related rates problems 2007-10-27
David pose la question :
Can you plz explain how and where you come up with an equation to solve this?
Find the rate of change of the distance between the origin and a moving point on the graph of y = sin x if dx/dt = 2 centimeters per second.

Stephen La Rocque lui répond.
Area of a triangle formed by three points on a graph 2007-10-26
Betty pose la question :
My question is 'find the are of a triangle whose vertices have coordinates (3,5),(6,-5), and (-4,10)
Stephen La Rocque lui répond.
Hitting golf balls 2007-10-03
Jessi pose la question :
Ben is out at the practice range hitting golf balls. How much further will a golf ball with an initial speed of 75.0 m/s go when projected at 45.0 degree than when projected at 30.0 degree?
Stephen La Rocque lui répond.
Will the stone catch up the parachute? 2007-10-03
anoi90 pose la question :
a small parachute dropped from a 30.0 m high cliff falls with a constant velocity of 1.20 m/s. 20.0 s after the parachute is dropped, a stone is dropped from a cliff. Will the stone catch up the parachute before it reaches the ground? (Include numerical proof!)
Stephen La Rocque lui répond.
Motion along a line 2007-10-02
Claudette pose la question :
If the position function of a particle is x(t) = sin^2(2t), find the distance that the particle travels from t = 0 to t = 2
Harley Weston lui répond.
Points that are 15 units from the origin 2007-09-20
Paula pose la question :
Find the coordinates of any point(s) 15 units away from the origin with an x-coordinate of 9.

I was given the answer: (9,12) and (9,-12), but I do not understand how these numbers were calculated. Thank you for your help!

Stephen La Rocque lui répond.
A round reservoir 2007-08-14
lee pose la question :
if you have a 46 acre round reservoir, how far around in feet would that be ??
Penny Nom lui répond.
Three runners on a circular track 2007-08-04
Arul pose la question :
A, B and C run around a circular track starting from the same point simultaneously and in the same direction at speeds of 4 kmph, 6 kmph and 8 kmph respectively. If the length of the track is 400 meters, when will A, B and C meet at the starting point for the first time after they started the race?

4 In the above question, when will they meet for the first time after they started the race?

Penny Nom lui répond.
At what speed does Chuck travel? 2007-07-27
Jessica pose la question :
Chuck and Dana agree to meet in Chicage for the weekend. Chuck travels 224 miles in the same time that Dana travels 204 miles. If Chuck's rate of travel is 5 mph more than Dana's, and they travel the same length of time, at what speed does Chuck travel?
Harley Weston lui répond.
Circumscribing a golden cuboid with a sphere: surface areas 2007-06-14
Ainslie pose la question :
A golden cuboid is defined as a rectangular prism whose length, width and height are in the ratio of phi : 1 : 1/phi.
Prove that the ratio of the Surface Areas of the golden cuboid to that of the sphere that circumscribes it is Phi : Pi.

Stephen La Rocque lui répond.
Throwing a ball from the top of a building 2007-06-12
Gilligan pose la question :
s = distance (in feet)
Building height = 96 feet
t = seconds
Use s = 96 + 80t - 16t^2 to answer the question given below.

QUESTION:
After how many second t will the ball pass the top of the building on its way down?

Penny Nom lui répond.
I have N data points in m-dimensional space 2007-04-29
Sid pose la question :
Hi, Given below is the problem that I am facing: I have N data points in m-dimensional space. I know the mean euclidean distance of the points from one given point (say the origin). Now I wish to find the mean Euclidean distance of the N points from another given point. How can i do this without knowing the values of the N points and only knowing the 2 origin points and the mean distance from one of the origin points ?
Penny Nom lui répond.
What is the speed of the boat? 2007-04-22
Sonja pose la question :
A boat on a river travels downstream between two points, 20 miles apart, in one hour. The return trip against the current takes 2 1/2 hours. What is the speed of the boat? The answer in the book says 14 mi/hr, but I don't understand how to figure it out. It must be very simple, but I'm stuck. Thank you so much for helping me out. This is a FANTASTIC website! -Sonja
Penny Nom lui répond.
How far apart are the cars? 2007-04-07
ian pose la question :
2 cars set off in opposite directions and travel for 6 miles, they both take a left turn, and travel for a further 8 miles........... how far apart are the cars???

a) 10 miles
b) 22 miles
c) 20 miles
d) 18 miles

Penny Nom lui répond.
A delivery driver travels from Belfast to an address in Dublin 2007-04-04
Gerry pose la question :
A delivery driver travels from Belfast to an address in Dublin.The total distance fro the round trip was x%.The time required for the forward trip was xx hours.Due to heavy traffic during the return trip an extra xx was required How much slower was the delivery drivers speed on the return trip?.

I was wondering what equation would you use to solve this question.

Penny Nom lui répond.
Tina swims 4 miles upstream at 1 mph 2007-03-31
Michael pose la question :
If Tina swims 4 miles upstream at 1 mph and back downstream to the same point to the same point at 4 mph, what is her average speed?
Penny Nom lui répond.
Two busses 2007-03-15
Devon pose la question :
A bus leaves a station at 1 p.m., traveling west at an average rate of 44 mi/h. One hour later a second bus leaves the same station, traveling east at a rate of 48 mi/h. At what time will the two buses be 274 mi apart?
Steve La Rocque and Penny Nom lui répond.
How long does she have to get out of the way? 2007-02-23
Sharon pose la question :
How do I solve this? The height h (in feet) of an object that is dropped from the height of s feet is given by the formula h = s - 16t^2 , where t is the time the object has been falling. A 6 foot tall woman on a sidewalk looks directly overhead and sees a window washer drop a bottle from the 6 story. How long does she have to get out of the way? Round to the nearest tenth. (A story is 12 feet.)
Penny Nom lui répond.
How far from the port is the point where the ship turned? 2007-02-19
Chris pose la question :
I was confused on this problem. If a ship leaves port and travel due east. At a certain point it turns 65 degrees south of east and travels b=322 nautical miles to a point 461 nautical miles on a direct line from port. How far from the port is the point where the ship turned?
Stephen La Rocque lui répond.
Increasing speed and decreasing time 2007-02-18
Nigel pose la question :
I am completely lost...can you help with this: The time, t, to travel a distance, d, at a constant speed, v, can be obtained from the formula: d = vt. If the speed is increased by x, find an expression to represent the decrease in time to travel the same distance.
Stephen La Rocque lui répond.
Romeo is throwing pebbles 2007-02-08
Jessie pose la question :
Romeo is chucking pebbles gently up to Juliet's window, and he wants the pebbles to hit the window with only a horizontal component of velocity. He is standing at the edge of a rose garden 4.5m below her window and 5.0m from the base of the wall. How fast are the pebbles going when they hit her window?
Stephen La Rocque lui répond.
A boat travels 60 miles downstream in the same time it takes to go 36 miles upstream 2007-01-27
Liz pose la question :
A boat travels 60 miles downstream in the same time it takes to go 36 miles upstream. The speed of the boat in still water is 15 mi/h greater than the speed of the current. Find the speed of the current.
Stephen La Rocque lui répond.
Freefalling objects 2007-01-25
Patricia pose la question :
How long will it take a stone dropped from atop a 1000-meter tall building to reach the ground?
Stephen La Rocque lui répond.
A college student jogs from his home to the beach 2007-01-23
Garmani pose la question :
A college student jogs from his home to the beach at 8 miles per hour. He visits with his friends on the beach for 4 hours, and then his friends drive him home at the rate of 40 miles per hour. If the student returns home after 6 hour, what is the distance from his home to the beach?
Penny Nom lui répond.
What is the speed of each boat per hour? 2007-01-22
Garmani pose la question :
Two tuna boats leave the same port traveling in opposite directions along the west coast of the United States. One boat travels 5 miles per hour faster than the other. At the end of one day's travel they are 1,080 miles apart. What is the speed of each boat per hour?
Penny Nom lui répond.
At what speeds were they travelling? 2007-01-16
Maria pose la question :
Kim and Julie are joining Nicole at her parents cottage for the weekend. The cottage is 150km away from their neighbourhood. Kim can leave directly after school but Julie will be leaving after band practice, an hour and a quarter later. Kim took her time and drove slowly, averaging 20km/h slower than Julie. They both arrived at the same time.
At what speeds were they travelling?

Stephen La Rocque lui répond.
What is his rate of walking for the entire trip? 2007-01-12
Garmani pose la question :
A man walks 500 feet at 4 miles per hour and returns to the starting point at 3 miles per hour. What is his rate of walking for the entire trip?
Stephen La Rocque lui répond.
Throwing a stone downwards 2007-01-12
Momo pose la question :
a stone is thrown vertically downward with an initial speed of 14m/s from a height of 65 m above the ground. A) how far does the stone travel in the first 2.0 s? B) what is the stone velocity just before it hits the ground?
Stephen La Rocque lui répond.
What is the speed of the current? 2007-01-07
Bob pose la question :
A motorboat can maintain a constant speed of 16 miles per hour relative to the water. The boat makes a trip upstream to a certain point in 20 minutes; the return trip takes 15 minutes. What is the speed of the current?
Haley Ess lui répond.
Cary was going to meet Jane at the airport, ... 2006-12-11
Carmen pose la question :
cary was going to meet jane at the airport, if he traveled 60mph, he would arrive one hour early, and he traveled 30 mph, he would arrive one hour late. how far was the airport? recall: distance=speed(time)
Stephen La Rocque lui répond.
Rate of a boat and a river 2006-12-09
Dale pose la question :
If a boat goes downstream 72 miles in 3 hours and upstream 60 miles in 6 hour, the rate of the river and the rate of the boat in still water respectively are ____?
Stephen La Rocque lui répond.
The Metra and the Amtrack 2006-12-03
Amy pose la question :
A Metra commuter train leaves Union Station in Chicago at 12 noon. Two hours later, an Amtrak train leaves on the same track, traveling at an average speed that is 50 miles per hour faster than the Metra train. At 3PM the Amtrak train is 10 miles behind the commuter train. How fast is each going?
Stephen La Rocque and Penny Nom lui répond.
A trip on the Grand River 2006-11-30
Kristy pose la question :
Romo decided to make a 28km trip up and 28km trip down the Grand River. the speed of the current is 3km. one way Romo travelled with the current and the other way against the current. During his trip, Romo stopped for half an hour for lunch. if Romo's total trip lasted 6hours, how fast did he travel?
Stephen La Rocque lui répond.
Two trains left the station at the same time and traveled in opposite directions. 2006-11-18
Tori pose la question :
Two trains left the station at the same time and traveled in opposite directions. The E train averaged 130 km/h. The A train's speed was 110 km/h. In how many hours were they 480 km apart?
Stephen La Rocque lui répond.
Find the distance function s(t) given the acceleration function a(t) 2006-11-16
David pose la question :
Find the distance function s(t) of the acceleration function: a(t)= sin(0.1t)/ cos^3(0.1t)
Penny Nom lui répond.
Going from one town to another 2006-11-04
Austin pose la question :
Going from one town to another,a man drives his car at 35 miles an hour and returning he drives at 25 miles an hour. the round trip takes 6 hours. Find the distance between the towns.
Stephen La Rocque lui répond.
Paddeling on the Alleman River 2006-10-31
Anita pose la question :
Len is planning a three-hour trip down the Alleman River and back to his starting point. He knows that he can paddle in still water at 3 mph and that the rate of the current is 2 mph. How much time can he spend going downstream? How far downstream can he travel?
Penny Nom lui répond.
The distance from a point to a line in 3 space 2006-10-29
Marie pose la question :
find the distance from the point (1, -2, -3) to the line x = y = z-2
Penny Nom lui répond.
How long will it be before the two snails meet? 2006-09-21
Brett pose la question :
Two snails are 8.5 feet apart. They start to crawl toward each other at the same time. One of them travels at the speed of 6 in. per minute, while the other zips along at 11 inches per minute. How long will it be before the two snails meet?
Penny Nom lui répond.
Flying with and against the wind 2006-07-06
Tim pose la question :
When a plane flies with the wind, it travels 800 miles in 4 hours. Against the wind it takes 5 hours to cover the same distance. Find the rate of the plane in still air and the rate of the wind.
Stephen La Rocque lui répond.
A boat travels 60 miles upstream ... 2006-05-28
Teenarick pose la question :
A boat travels 60 miles upstream against the current in 3 hours. It takes 2 hours for the return trip. Find the speed of the boat in still water.
Penny Nom lui répond.
The distance to the moon from earth 2006-05-19
Maira pose la question :
Using trigonometric functions first, show how to find the distance to the moon from earth and then find the radius of the moon.
Stephen La Rocque lui répond.
Absolute Value vs. Standard Deviation ? 2006-04-24
Sonia pose la question :
Why we don't just take the average of the absolute value of difference scores (use the mean deviation) to describe variability instead of calculating the standard deviation?
Claude Tardif lui répond.
Distance to the horizon 2006-04-20
Raymond pose la question :
If I stand on the edge of the sea on a beach and look into the horizon, is there a way or formula for calculating the distance from myself to the horizon?
Stephen La Rocque lui répond.
Wes and Tony live 360 km apart. 2006-04-01
Thiru pose la question :
Wes and Tony live 360 km apart. If Wes travels at 80 km/h towards Tony. And Tony travels at 100 km/h towards Wes, how long will it take before they meet.
Penny Nom lui répond.
How far from Earth is Neptune? 2006-03-21
Scott pose la question :
A laser beam travelling at the speed of light bounces off the planet Neptune and returns to Earth in 29 960.72 s. The speed of light is 299 792.5 km/s. How far from Earth is Neptune?
Penny lui répond.
Luke and Slim have only one horse. 2006-02-26
Emily pose la question :
Luke and Slim have only one horse. Luke rides for the agreed on distance and then ties up the horse for Slim, who has been walking. Meanwhile, Luke walks on ahead. They alternate walking and riding. If they walk 4 miles per hour, and ride 12 miles per hour, what part of the time is the horse resting?
Penny Nom lui répond.
Traveling from Asheville to Indianapolis 2006-02-21
Grace pose la question :
Carol was traveling from Asheville, North Carolina, to Indianapolis, Indiana, by bus. At the halfway point of her trip, in terms of distance, she fell asleep. When she awoke, her distance to Indianapolis was half the distance that she had traveled while she slept. For what fraction of her trip did Carol sleep?
Penny Nom and Stephen La Rocque lui répond.
A locus problem 2006-02-08
Jason pose la question :
If the distance from p(1,5) is 3/4 that of the distance of a(4,-3)? find the equation of a locus.
Penny Nom lui répond.
What initial velocity is required to double the maximum height 2006-01-14
A photographer pose la question :
A body is thrown into the air with an initial velocity V ft./sec. What initial velocity is required to double the maximum height previously obtained?
Penny Nom lui répond.
60.5 ft at 90 mi/hr takes how long? 2006-01-13
Bree pose la question :
A ball travels over 60.5 ft at 90 mi/hr. How fast does the ball travel?
Penny Nom lui répond.
A long distance call 2005-12-05
A student pose la question :
The Small World long distance phone company charges 55cents for the first minute of a long distance call and 23cents for each additional minute.

1. How much would a 10- minute long-distance call cost?

2. If a call costs $4.55. how long did the call last?

3. Write an equation for the total cost, C, of an m-minute long-distance call.

Penny Nom lui répond.
City A is 30 miles directly north of City C 2005-10-04
A student pose la question :
City A is 30 miles directly north of City C, and City B is 40 miles directly east of City C. Cities A and B are connected by a straight road. Find the length of the shortest path from City C to the road that connects A and B.
Penny Nom lui répond.
The shortest distance from a point to a line 2005-03-30
carly pose la question :
Find the shortest distance from the point (-15, 2.5) to the line 5x+6y=30.
Penny Nom lui répond.
A rate of change problem 2004-10-15
Frank pose la question :
Find the rate of change of the distance between the origin and a moving point on the graph of y = x(squared) + 1 if dx/dt = 2 centimeters per second.
Penny Nom lui répond.
The distance formula 2004-09-04
Joe pose la question :
Why do we use square roots and squares in the distance formula Wholdnt they cancel each other out?
Claude Tardif lui répond.
How far apart are they? 2004-05-23
A student pose la question :
2 cars start at same loc. drive opposite direction for 6 miles then they each turn left and travel for 8 miles how far apart are they?
Penny Nom lui répond.
Distance, time and rate 2004-03-09
Peter pose la question :
A car travels from one city to another at the speed of 32mph, if it had gone 4mph faster it could have made the trip in one half hour less. How far apart are the cities?
Penny Nom lui répond.
Driving from Sarnia 2004-02-11
Jane pose la question :
"Crystal drove from Sarnia at 80km/hr. Emily left Sarnia one hour later and drove along the same road at 100km/hr. How far from Sarnia did Emily overtake Crystal?"
Claude Tardif lui répond.
The London marathon 2004-01-27
Nina pose la question :
After a years training, Minnie Midriffe increased her average speed in the london marathon by 25%. By what percentage did her time decrease?o
Penny Nom lui répond.
Business trip 2003-12-19
Ameer pose la question :
A businnessman drives from Washington, D.C., to Boston, a distance of 442 miles, and then makes the return trip. On the way to Boston, he drives 65 miles per hour, taking an 1-hour rest stop during the drive. After finishing his business in Boston, he make the return trip driving at 60 miles per hour and takes a 45-minute rest stop halfway through the trip. Which leg of the journey, Washington, D.C. to Boston, or Boston to Washington, D.C., takes the longer time?
Penny Nom lui répond.
A point and a line 2003-11-19
Meenakshi pose la question :

Given a line segment L(x1,y1) to (x2,y2) and a Point P(x3,y3).
I need the formula to find a point on the line L that is closest to the point (x3,y3).


Penny Nom lui répond.
A boat travels 12 km upstream... 2003-09-03
Sohaib pose la question :
A boat travels 12 km upstream and back in 1 hour 45 minutes. If the speed of the current is 3km/hr throughout, find the speed of the boat in still water, giving your answerÝcorrect to 3 decimal places.
Penny Nom lui répond.
Two cars 2003-07-09
Nicole pose la question :
Two cars start off at the same point on a striaght highway facing opposite directions. Each car drives 6 miles, talkes a left turn, and drives for 8 miles. How far apart are the two cars.
Penny Nom lui répond.
Is 3/5 CLOSEST to 0, 1/2 or 1? 2003-07-09
A student pose la question :
I would like to know is 3/5 CLOSEST to 0, 1/2 or 1. And can 3/10 go either way as to be closest to 0 or 1/2.
Penny Nom lui répond.
Two airplanes leave Dallas 2003-02-06
A student pose la question :
TWO AIRPLANES LEAVE DALLAS AT THE SAME TIME AND FLY IN OPPOSITE DIRECTIONS. ONE AIRPLANE TRAVELS 80 MILES PER HOUR FASTER THAN THE OTHER. AFTER THREE HOURS, THEY ARE 2940 MILES APART. WHAT IS THE RATE OF EACH AIRPLANE?
Penny Nom lui répond.
A train with 2 cars 2003-02-04
Michael pose la question :
A train with 2 cars is traveling at a speed of 80 km/hr from town X to town y, located 800 km from each other. At the same moment that the train departed, a passenger started to walk back and forth from one end of car B to the other at a speed of 100cm/sec. Arriving in town Y, the passenger had already gone and returned 720 times. The length of car A is that of car B plus one fourth of the length of the locomotive, and the length of the locomotive equals the length of Car A plus one fifth of the length of car B. What is the total length of the train?
Penny Nom lui répond.
Miles per hour 2002-11-28
Liz pose la question :
If a car has traveled 16 miles in 30 minutes, how many miles per hour did they go?
Penny Nom lui répond.
How long will it be before you reach your friend? 2002-09-16
Margaret pose la question :
Your friend runs at 8 miles per hour and you drive at 40 miles per hour, hence the diatance between you is decreasing at 32 miles per hour. You firend left 2 hours before you so how far has he gone in that 2 hours? How long will it take for the distance between you to decrease to 0 miles if the distance is decreasing at 32 miles per hour?
Penny Nom lui répond.
Distance in 3-space 2002-08-16
David pose la question :
The question is: how do I figure out the distance of one object in 3D space to another object in 3D space? I have an object at say x = 5.872, y = 2.876, and z = 7.290; and the other object is at x = 1.129, y = -8.213, and z = -11.127. I have been suggested to use the pythagorean theory on this, but since there are three variables, I don't understand how.
Penny Nom lui répond.
Bob swam across a river 2002-05-22
Torri pose la question :
Bob swam across a river 420 ft wide. A strong current carried him 580ft downstream as he swam. Find x, the distance bob actually swam.
Penny Nom lui répond.
Trains and cracker boxes 2002-04-29
Lindsay pose la question :
1)Two trains are 250 miles apart on the same track heading towards eaxh other at 7AM- The first train travels at 55mph, the second at 75mph. At what time would they crash?

2)A cracker box measures 12 by 2 by 18 inches. The company wants to double the amount of crackers, but keep the shapes the same[similar] Find the new length[nearest tenth of an inch]


Penny Nom lui répond.
A test drive 2002-04-23
Jennie pose la question :
At 9 A.M. a test car driving at a constant speed passes a marker 50 miles from it's starting point. At noon the car is about 130 miles from the marker. If the test drive ends at 1:30 P.M., how far will the car be from its starting point?
Penny Nom lui répond.
15 miles at 13 miles per hour 2002-03-12
Rich pose la question :
If I were traveling 15 miles at 13 miles per hour how long will it take?
Penny Nom lui répond.
The distance across a circle 2002-01-18
Douglas pose la question :
If you know how far around a circle is (say earth) 25000 miles how do you calculate the distance across?
Penny Nom lui répond.
The famous "train problem" 2002-01-12
Karen pose la question :
How do you solve the famous "train problem"? For example, 2 trains leave different stations at the same time. One is traveling at 50 mph and the other at 40 mph. How long does it take them to meet?
Penny Nom lui répond.
Julia goes to work 2001-09-25
Karyna pose la question :
On one October morning, Julia rides her bike (at 12 miles per hour) from her home to her friend Ida's house; then the two of them walk (at 6 miles per hour) to work. If it takes an hour for Julia to go the 10 miles from her home to work, how far does she walk?
Penny Nom lui répond.
Ray and Jane 2001-09-06
A student pose la question :
If Ray and Jane live 150 miles apart and they both leave their house at the same time, Ray goes 30 mph the whole time and Jane goes 50 mph the whole time how many miles are they from Ray's house when they meet? And what is the exact travel time untl they meet.
Penny Nom lui répond.
Joe and his dad 2001-08-28
Sarah pose la question :
Joe Spout left a campsite on a trip down the river in a canoe, traveling at 6 km/h. Four hours later, Joe's father set out after him in a motorboat. The motorboat traveled 30 km/h. How long after Joe`s father started did he overtake the canoe? How far had Joe traveled down the river when his father overtook him?
Leeanne Boehm lui répond.
The shortest distance from a point to a line 2001-06-05
Kat pose la question :
Find the shortest distance from the given line. Round to the nearest tenth. (-2,-1) and x+5y+20=0
Penny Nom lui répond.
A problem with distance 2001-01-16
A student pose la question :
For what values of a is the distance between P(a, 3) and Q(5, 2a) greater than the square root of 26.
Penny Nom lui répond.
Connecting to a water line 2000-10-20
Vanja pose la question :
My question is...A house is to be connected to a new water main that runs along the line y=2/3x-1. The connection point at the house has coordinates (2,9), where the units represent metres. What lenght of plastic pipe is needed to connect to the water main at the closest point?
Penny Nom lui répond.
Two geometry problems 2000-09-09
Becky pose la question :
What are all the real values of x that are solutions for the inequality [x-2] < 6? ( it's less than or equal to)

What is the distance between the points with (x,y) coordinates (3,-2) and (-3,-1)?


Peny Nom lui répond.
Euclidean distance 2000-09-06
Velma Zahirovic-Herbert pose la question :
If d(x,y) is euclidean distance between x and y Prove that
d(x,y)>=0
if d(x,y)=0 than x=y
and d(x,y)=d(y,x)

Paul Betts lui répond.
A centroid problem 2000-06-02
Kerstin pose la question :
An isoceles triangle has sides measuring 13 cm, 13 cm, and 10 cm. Find the distance from the centroid to the vertex of a base angle.
Harley Weston lui répond.
Taxicab geometry 2000-01-16
Jack pose la question :
Im doing an investigation entitled 'taxicab geometry', ive attempted it and have done most of the practical part of it. But i cant seem to see the equation behind it all. please guide me in the right direction.

They provide a regular grid with regular horizontal and vertical lines. The lines are roads and the actual squares are blocks of hoouses/ buildings.

In taxicab geometry the distance between place A & B is worked out by adding together the horizontal and vertical distances. each square is counted as i unit.

Part 1 (I've done this)

A taxix cab firm is based at A. the posistion B is 7 units away from A. investigate all the posistions of B at 7 units. investigate for different distances.

.
.
.

Penny Nom lui répond.
Distance between the windows 1999-09-19
Lawrence pose la question :
An observer on level ground is at distance d from a building. The angles of elevation to the bottom of the windows on the second and third floors are a and b respectively. Find the distance h between the bottoms of the windows in terms of a b and d
Harley Weston lui répond.
A bike race 1999-04-23
Bill Gepford pose la question :
Bill was in a bike race and his friend kyle calculated that if he went 15mph that he would cross the noontime checkpoint one hour early but if he rode 10mph he would arrive one hour late.
How far away is the checkpoint?

Penny Nom lui répond.
An airplane problem 1999-03-08
B.M.R. pose la question :
A plane left New York and headed East to its destination 3600 miles away across the Atlantic. On the way back its speed was boosted by a 50 mph tail wind and it arrived an hour early. What was its normal speed?
Jack LeSage lui répond.
Absolute value of i 1999-01-06
Wayne Bagley pose la question :
I would like to know what is the absolute value of i. I need an answer suitable for the secondary level.
Harley Weston lui répond.
Two Chords 1998-09-29
Jennifer Cane pose la question :
Question:
two parallel chords of a circle, AB and CD, have lengths of 10 cm and 17 cm respectively. The diameter of the circle is 21 cm. Find the shortest distance between the chords.

Harley Weston lui répond.
Nickles on the Highway 1998-09-22
Ronnie Mac Donald pose la question :
How many nickels would it take to cover 226km of highway,each nickel is 2cm in diameter?
Penny Nom lui répond.
 
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