Please answer the following question on Related Rates-Angle of Elevation, including the knowns/unknowns, appropriate diagram and concluding statement: Joe starts up a machine and gravel is dumped from a conveyer belt at a rate of 30 ft3/sec. The courseness of the gravel is such that it forms a pile in the shape of a cone whose base diameter and height are always equal. How fast is the height of the pile of gravel changing

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