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January 25, 2015

January 25, 2015

Posted by **Jeff** on Sunday, July 31, 2011 at 5:49am.

- Math -
**drwls**, Sunday, July 31, 2011 at 7:12amWater depth = y

Surface water radius r = 3 y/8 ft

Water volume V = (1/3)*pi*(3y/8)^2*y

= (3 pi/64)y^3

dV/dt = 2.0 ft^3/min = (9*pi*y^2/64)*dy/dt = pi*r^2*(dy/dt)

When y = 2.5 ft

dy/dt = 4.53 ft/min

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