SOLUTION: A pipe of 2 inch diameter fills the water tank in one hour. If the diameter of the pipe is 4 inch in what time will the pipe fill the same tank?
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Question 633947: A pipe of 2 inch diameter fills the water tank in one hour. If the diameter of the pipe is 4 inch in what time will the pipe fill the same tank?
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!
The volume of water that flows through a pipe is proportional to the cross-sectional area (the area of a circle with diameter equal to the inside diameter of the pipe). Since the area of a circle is given by 
, the flow is proportional to the square of the radius. So how much larger is ^2)
than 
?
John
My calculator said it, I believe it, that settles it
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