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January 28, 2015

January 28, 2015

Posted by **Simon** on Tuesday, February 5, 2013 at 11:01am.

- Math -
**Steve**, Tuesday, February 5, 2013 at 11:18ama = 2pi*r*h

a' = 2pi(2/3 r)(4/7 h) = 2pi*rh*8/21

a:a' = 1:8/21 = 21:8

Note that the ratio is just the product of the linear ratios.

- Math -
**Simon**, Tuesday, February 5, 2013 at 12:36pmThank you

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