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related rates An upside down cone is being emptied at the rate of 4 cubic feet...

related rates

An upside down cone is being emptied at the rate of 4 cubic feet per second. The height of the cone is 20 feet and the radius is 6 feet. Find the rate of the change of water level when the depth is 12 feet.

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Math   Calculus   
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Answer #1

Note that means change in water level and means change in radius of crossection.

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