Homework Help: Math

Posted by Nia on Wednesday, March 23, 2011 at 9:03pm.

Find the missing dimensions for each three-dimensional figure to the nearest tenth given the volume and other dimensions.

I'm not understanding the cones too much.

r=5in., v = 487in.3 How do I work it, given only the radius

Math - bill, Wednesday, March 23, 2011 at 9:44pm
pie r squared times v
Math - Reiny, Wednesday, March 23, 2011 at 10:01pm
you are missing the height, h

Volume of cone = (1/3)πr^2h
487 = (1/3)π(25)h
h = 487(3)/(25π) = appr. 18.6 in

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