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September 2, 2014

September 2, 2014

Posted by **stephen** on Saturday, January 1, 2011 at 6:20pm.

- math -
**Damon**, Saturday, January 1, 2011 at 6:30pmA = pi r^2

dA/dt = pi (2r) dr/dt

12 = pi (2*3) dr/dt

dr/dt = 2/pi mm/hr

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