SOLUTION: The amount of water emptied by a pipe varies directly as the square of the diameter of the pipe. For a certain constant water flow, a pipe emptying into a canal will allow 200 gal

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Question 1110156: The amount of water emptied by a pipe varies directly as the square of the diameter of the pipe.
For a certain constant water flow, a pipe emptying into a canal will allow 200 gal of water to
escape in an hour. The diameter of the pipe is 6 in. How much water would a 12 in pipe empty
into the canal in an hour, assuming the same water flow?

Found 2 solutions by Alan3354, josgarithmetic:
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
The amount of water emptied by a pipe varies directly as the square of the diameter of the pipe.
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Think about it.

Answer by josgarithmetic(39623) About Me  (Show Source):
You can put this solution on YOUR website!
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The amount of water emptied by a pipe varies directly as the square of the diameter of the pipe.
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Recognize the description as "variation"; Direct Variation.

Q, amount of water
k, variation constant
d, diameter of pipe

Q=k%2Ad%5E2

Work the rest from that.