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December 20, 2014

December 20, 2014

Posted by **Anonymous** on Wednesday, December 19, 2012 at 6:50am.

- maths -
**Steve**, Wednesday, December 19, 2012 at 10:48amfor the hollow cylinder,

outside volume is pi * 1^2 * 16 = 16pi

inside volume = pi * (1-.25)^2 * 16 = 9pi

volume of metal = 7pi cm^3

volume of solid is thus

7pi = pi * 1^2 * h = h*pi

h = 7 cm

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