Gravel is being unloaded from a truck and falls into a pile shaped like a cone at a rate of 16 cubic feet per minute. the radius of the cone base is 4 times the height of the cone. find the rate at which the height of the gravel changes when the pile has a height of 7 feet.

answer

d. 10

explanation

the distance from point y to wx is the height of the triangle.

using pythagoras theorem,

group similar terms to get,

this implies that,

take positive square root of both sides to get,

this implies that,

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step-by-step explanation:

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