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OpenStudy (anonymous):
sand falls from an over head bin and accumulates in a conical pile with radius that is always three times the height. suppose the height of the pile increases at a rate of 2cm when the pile is 12cm high. at what rate is the sand leaveing the bin that instant
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OpenStudy (amistre64):
you will want to know the formula for the volume of a cone
OpenStudy (amistre64):
since r = 3h, replace r by 3h and simplify the results take the derivative of V wrt.h and insert the given info to solve for V'
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