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December 19, 2014

December 19, 2014

Posted by **joseph** on Thursday, December 30, 2010 at 3:33pm.

- calculus -
**Marth**, Thursday, December 30, 2010 at 3:52pmFor a cone, V = (1/3)(pi)(r^2)(h).

But h=3r, so V = (pi)r^3.

Differentiate with respect to time.

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

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

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