15. Sand is falling off a conveyor belt at a rate of 12 cubic feet per minute into a conical pile. The diameter of the pile is four times the height. At what rate is the height of the pile changing when the pile is 10 feet high?

Calculus: Early Transcendentals
8th Edition
ISBN:9781285741550
Author:James Stewart
Publisher:James Stewart
Chapter1: Functions And Models
Section: Chapter Questions
Problem 1RCC: (a) What is a function? What are its domain and range? (b) What is the graph of a function? (c) How...
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14. A child is flying a kite. If the kite is 90 feet above the child's hand level and the wind is
blowing it on a horizontal course at 5 feet per second, how fast is the child letting out the cord
when 150 feet of cord is out? (Assume the cord forms a straight line – i.e. there is no slack
in the string.)
15. Sand is falling off a conveyor belt at a rate of 12 cubic feet per minute into a conical
pile. The diameter of the pile is four times the height. At what rate is the height of the pile
changing when the pile is 10 feet high?
Transcribed Image Text:14. A child is flying a kite. If the kite is 90 feet above the child's hand level and the wind is blowing it on a horizontal course at 5 feet per second, how fast is the child letting out the cord when 150 feet of cord is out? (Assume the cord forms a straight line – i.e. there is no slack in the string.) 15. Sand is falling off a conveyor belt at a rate of 12 cubic feet per minute into a conical pile. The diameter of the pile is four times the height. At what rate is the height of the pile changing when the pile is 10 feet high?
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