







The radius of a coffee cup 
20160912 

Brett pose la question : What is inside radius, in centimeters of a coffee cup if it holds 350g of coffee when filled to a depth of 9.5 cm? Assume coffee has the same density of water, 1.00g/cm3. A numeric value is expected and not an expression. Penny Nom lui répond. 





Two teams of 4 playing 4 rounds of golf 
20130929 

Tom pose la question : We would like to play a ryder cup format with two teams of 4 playing 4 rounds of golf. Three of the rounds would be pairs playing each other and one round would be singles. How can we set up the foursomes so we balance the number of times we play with every other golfer. Victoria West lui répond. 





A label to cover a plastic cup 
20121023 

Kevin pose la question : I'm trying to make a label to cover the entire outer area or a plastic cup. I know there must be a way to figure out the dimensions needed, but I can't seem to figure it out. The circumference of the bottom of the cup is 21.4cm and the circumference at the top of the cup is 29.8cm. The cup is 14.5cm tall. What should the height of the arc from the plane connecting the two ends of the 21.4cm arc. I attached a diagram where x is the value I'm looking for. I'm guessing there is some simple relationship between the length of a line and the arc needed to turn that line into a perfect circle, but I don't know what it is. Can you figure this out and share it with me? Thanks.
Kevin Penny Nom lui répond. 





Golf for 20, two teams of 10 
20120830 

Mark pose la question : Hi
I have to teams of 10 people playing Ryder cup format(against each other)
Can I have all 20 people playing with someone different over 3rounds of golf while remaining on there respective team I.e. players 1 to 10 must team up with a player of that group against a pair for players 11 to 20
I hope you can solve this for me
Thanks a bunch Mark Victoria West lui répond. 





Water is flowing into a cup 
20111219 

Tim pose la question : A cup has a radius of 2" at the bottom and 6" on the top. It is 10" high. 4 Minutes ago, water started pouring at 10 cubic " per minute. How fast was the water level rising 4 minutes ago? How fast is the water level rising now? What will the rate be when the glass is full? Penny Nom lui répond. 





Volume of a styrofoam cup 
20100623 

Stacy pose la question : how do you find the volume of a truncated cup with height of 3, top diameter of 2.5, and a bottom diameter of 2 Penny Nom lui répond. 





A 3D cardboard cupcake 
20100130 

Margaret pose la question : Hi,
I'm an art student and I'm attempting to build a 3D cupcake out of cardboard.
I want it to have a circular base of 8.5 inches and sides that are 7'' tall and slope outward so the top of the base is 29'.
The top with the frosting would be a detachable lid made from a cone with a base circumfrance of 29".
My problem is how to cut the side so they will slope out, I'm pretty sure there needs to be a curve, however I don't how to calculate the degree of it.
Ideally I want the sides to be a single piece of cardboard.
I also don't know how to calculate the arc needed to make a cone who's circular base's circumfrence is 29''.
Thanks,
Margaret Stephen La Rocque lui répond. 





Coffee scoops per cup 
20090629 

charity pose la question : if my coffee machine takes 10 scoops for every six cups, how many scoops do i need for 4 cups.
each scoops equals one tbls(.25 oz) Penny Nom lui répond. 





Find out the length of a cup when its volume is halved 
20090525 

Thomas pose la question : I'm having trouble with a question.
What kind of formula would i use to find out the length of a cup when its volume is halved? Stephen La Rocque lui répond. 





12 oz. cup 
20090419 

Tom pose la question : I am a ceramic teacher and wanted my students to make a 12 oz. cup, what formula should we use? Chris Fisher lui répond. 





Stanley Cup costume (truncated cone pattern) 
20071019 

Janet pose la question : You hockey fans will love this question. I am making a Stanley Cup halloween costume and need a flat pattern for the bowl portion. I believe a truncated cone will work nicely. Base circumference needs to be 32" (10.19 diameter). Top circumference needs to be 44" (14 diameter). It needs to be 8" high. Thanks for your help. Stephen La Rocque lui répond. 





A conical cup 
20071018 

Nicholas pose la question : Water is leaking out of a small hole at the tip of a conical paper cup at the rate of 1cm^3/min. The cup has height 8cm and radius 6cm, and is initially full up to the top. Find the rate of change of the height of water in the cup when the cup just begins to leak.
Since V= (pi/3)r^2h, how do I eliminate a variable or change the equation so I that I can answer the question? Thanks. Penny Nom lui répond. 





What is 240mL of water in cups? 
20070816 

Gareth pose la question : What is 240mL of water in cups? Penny Nom lui répond. 





Conversion of a recipe 
20050206 

Peg pose la question :
A Hungarian friend gave me an old, old family recipe and it calls for:
20 dg. sugar
15 dg. filbert
I can't find a conversion table anywhere that explains how to get ounces from "dg." Do you know what the equivalent would be in ounces of dry measurement?
Harley Weston lui répond. 

