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September 18, 2014

September 18, 2014

Posted by **Barb** on Monday, February 18, 2013 at 12:26pm.

I know th formula for SA is SA = 2pir^2 + 2pirh

I know h = 2d.

I know r = 1/2 d

What is h in relations to r? Is is 4r?

- Math - Please Help -
**Steve**, Monday, February 18, 2013 at 1:27pmyou are correct. h = 4r

1200 = pi r^2 h = pi * r^2 * 4r = 4pi r^3

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