Example 3-6-3 - Maple Help



Chapter 3: Applications of Differentiation



Section 3.6: Related Rates



Example 3.6.3



 Sand pouring from a hopper at a steady rate forms a conical pile whose height is observed to remain twice the radius of the base of the cone.  When the height of the pile is observed to be 20 ft, the radius of the base of the pile appears to be increasing at the rate of a foot every two minutes.  How fast is the sand pouring from the hopper?







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