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First find the area of round part of the pipe. That's pi x d x d / 4.

So 3.14 * 4 * 4 / 4 = 12.56 square feet.

Then multiply by the length to get volume.

12.56 sq ft x 13 ft = 163.26 cubic feet.

There are 7.48 gallons in a cubic foot so,

Volume of your pipe is 7.48 * 163.28 = 1,221.33 gallons.

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15y ago

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