Sand falling from a chute forms a conical pile whose altitude is always equal to 4/3 the radius of the base. How fast is the radius increasing when it is 6 ft and the volume is increasing at the rate of 24 ft3 /min? a. 0.159 ft/min b. 0.955 ft/min c. 0.053 ft/min d. 0.796 ft/min

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