# maths

A rectangle is of length 8 inches, breath 11 inches and thickness 2 inches. When it is shaped to a cylindrical rod with the diameter is 10m. What is the height of the cylinder?

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1. Don't see how the rectangular parallelopiped (not a rectangle, which is a 2-dimensioanl figure) could be deformed into a cylinder of height 10, but assuming you mean to find the dimensions of a cylinder with equal volume,

volume = 8*11*2 = 176 in^3 = 2884.112 cm^3

volume of rod is pi r^2 * h, so since r = 5m = 500cm,
250000pi h = 2884.112
h = .00367

So, there appears to be a typo in the problem. I wouldn't describe such a figure as a rod.

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posted by Steve

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