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Volume of a cylinder = (pi) x (radius)2 x (length)

Radius of an 18-inch pipe is 9 inches.

Volume of a 1-foot section = (pi) x (9)2 x (12) = 3,053.6 cubic inches = 13.219 gallons (rounded)

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10y ago
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Q: How many gallons of water per foot will a eighteen inch pipe hold?
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