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October 20, 2014

October 20, 2014

Posted by **idk** on Thursday, February 25, 2010 at 6:15pm.

- calculus -
**Damon**, Thursday, February 25, 2010 at 6:47pmA = surface area = (4/3) pi r^2

so

d A/dt = (8/3) pi r dr/dt

now get dr/dt from:

D Volume = surface area*dr=(4/3) pi r^2 dr

so

dV/dt = (4/3)pi r^2 dr/dt

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