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October 21, 2014

October 21, 2014

Posted by **Rina** on Sunday, November 6, 2011 at 6:51pm.

- Calculus -
**Damon**, Sunday, November 6, 2011 at 7:05pmThat is a pretty big snowball !

V = (4/3) pi r^3

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

10 = 4 pi r^2 dr/dt

since r = 1

dr/dt = 10/(4 pi)

note : using common sense we knew that. The rate of change of the volume is the surface area 4 pi r^2 times the rate of radius change

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