SOLUTION: Gerry wants to inflate an exercise ball. The ball has a radius of 15 inches. If a pump can push 5 cubic inches of air everysecond, how many seconds will it take to inflate the ball

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Question 187978: Gerry wants to inflate an exercise ball. The ball has a radius of 15 inches. If a pump can push 5 cubic inches of air everysecond, how many seconds will it take to inflate the ball?
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
Gerry wants to inflate an exercise ball. The ball has a radius of 15 inches. If a pump can push 5 cubic inches of air everysecond, how many seconds will it take to inflate the ball?
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The volume of a sphere of radius r is
V+=+4%2Api%2Ar%5E3%2F3
V+=+4%2Api%2A3375%2F3
V = 4500*pi cubic inches
t = 4500pi/5 = 900*pi seconds
t = ~ 2827.43 seconds