A cement mixer is pouring concrete in a conical pile. At the time when the height and base radius of the concrete cone are, respectively, 3 and 12 feet, the rate at which the height is increasing is 1 feet per minute, and the rate at which the volume of cement in the pile is increasing is 96π cubic feet per minute. At that moment, how fast is the radius of the cone changing?
A cement mixer is pouring concrete in a conical pile. At the time when the height and base radius of the concrete cone are, respectively, 3 and 12 feet, the rate at which the height is increasing is 1 feet per minute, and the rate at which the volume of cement in the pile is increasing is 96π cubic feet per minute. At that moment, how fast is the radius of the cone changing?
Calculus: Early Transcendentals
8th Edition
ISBN:9781285741550
Author:James Stewart
Publisher:James Stewart
Chapter1: Functions And Models
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A cement mixer is pouring concrete in a conical pile. At the time when the height and base radius of the concrete cone are, respectively, 3 and 12 feet, the rate at which the height is increasing is 1 feet per minute, and the rate at which the volume of cement in the pile is increasing is 96π cubic feet per minute. At that moment, how fast is the radius of the cone changing?
(Volume of a cone with radius r and height h is given by V=13πr2h.)
(Hint: Use the multi-variate chain rule)
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