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September 18, 2014

September 18, 2014

Posted by **Rav** on Monday, November 12, 2012 at 10:30pm.

- math -
**Reiny**, Monday, November 12, 2012 at 11:27pmV = (4/3)πr^3

dV/dt = 4πr^2 dr/dt

when r = 7 , dr/st = 2

dV/dt = 4π(49)(2) = 392π cm^3/sec

= appr 1231.5

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