Wheat is poured on the ground at the rate of 12 cu. ft/sec. The pile forms a cone whose altitude is always three-fourths of the radius. Find the rate at which the altitude is increasing when the altitude is 6.0 ft. O 0.030 ft/s O None of the choices O 0.060 ft/s O 0.189 ft/s O 1.132 ft/s to

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