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Sand Is Falling into a Conical Pile So That the Radius

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Sand is falling into a conical pile so that the radius of the base of the pile is always equal to one half its altitude. If the sand is falling at the rate of 5 cubic feet per minute, how fast is the altitude of the pile increasing when the pile is 3 feet deep? Sand is falling into a conical pile so that the radius of the base of the pile is always equal to one half its altitude. If the sand is falling at the rate of 5 cubic feet per minute, how fast is the altitude of the pile increasing when the pile is 3 feet deep?

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