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September 20, 2014

September 20, 2014

Posted by **Marney** on Sunday, September 16, 2012 at 7:33am.

- Math -
**Reiny**, Sunday, September 16, 2012 at 9:38amV = (1/3)πh^2 (18-h)

= 6πh^2 - (1/3)πh^3

dV/dt = 12πh dh/dt - πh^2 dh/dt

4 = dh/dt(12πh - πh^2)

when h = 2

4 = dh/dt(24π - 4π)

dh/dt = 4/(20π) = 1/(5π) cm/s

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