3 articles trouvés pour ce sujet.
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A railway bridge over a road is in the shape of a parabola |
2011-11-23 |
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Brennen pose la question :
A railway bridge over a road is in the shape of a parabola,
and the bridge is 3 m high in the middle and 6 m wide at its base.
A truck that is 2m wide is approaching the bridge.
What is the maximum height that the truck can have and
still pass under the bridge? Explain.
Thank you!!
Penny Nom lui répond. |
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A railway cut |
2009-01-30 |
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Jean pose la question :
A railway cut 200ft. long and 30ft. wide at the bottom is made with sloping sides, which are 80ft. and 60ft. in length. The 80-ft. side is inclined 45 degrees and the other side is 35 degrees to the horizontal. Find the cost of removing the earth at $2 per load, if the trucks have capacity of 4cu. yd.
Penny Nom lui répond. |
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Chord, radius, arc length and central angle |
2008-04-15 |
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Cindy pose la question :
There is a railroad curve with a chord length of 2000 ft. and a central angle of 35 degrees. What is the radius and arc length of the circular arc?
Stephen La Rocque lui répond. |
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