Homework Help: geometry

Posted by viri on Sunday, April 11, 2010 at 11:28pm.

if two cones are similar and the ratio between the lengths of the radii is 7:3, what is the ratio of their surface areas

geometry - drwls, Monday, April 12, 2010 at 7:48am
(7/3)^2 , which is 49:9

Any pair of corresponding areas is proportional to the square of any pair of corresponding linear dimensions. Fot volume, the ratio is the cube of any linear ratio.

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