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Well first remember that volume is area times height. So first think about what the area of a cross-section of a pipe would be. The cross section would be a circle, and we know the circle is 3 inches in diameter. So use the formula for area of a circle (pi times the radius squared) and multiply that by the length of the pipe. Remember that the radius is half the diameter. Still need help?

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15y ago
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1mo ago

The volume of a pipe can be calculated using the formula πr^2h, where r is the radius and h is the height (length of the pipe). Since the diameter is given, the radius is half of that, so 3 inches diameter is 1.5 inches radius. First, convert all units to the same system (e.g., inches to feet) before plugging them into the formula to get the volume.

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14y ago

assuming that "1 inch" means the inner diameter,

r = 0.5 inches

volume = (pi x r2) x 12 inches [I converted feet to inches to keep the units the same]

volume = 9.42 cubic inches

If the outer diameter is one inch, subtract the thickness of the pipe from 0.5 and recalculate

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14y ago

9.425 cubic inches or 0.0408 gallons of liquid.

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14y ago

V = 1.473 ft3

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14y ago

0.88357 cubic feet.

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Q: Volume of a 3 inch diameter pipe 30 foot long?
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How many gallons of water in a 2 inch pipe by 80 foot long?

Completely filled, (pi x radius squared x length in inches)/231 cu in per gallon = gallons = 13.06122449, if the inside diameter of the pipe is 2 inches. =========== Of course that assumes that the inside diameter is exactly 2 inches. For real pipes, the actual inside diameter of a pipe depends on the "schedule" of the pipe. For a "nominal" pipe diameter of 2 inches, the outside diameter will be 2.375 inches and the wall thickness could vary from .065 inches (schedule 5) to .343 inches (schedule 160) meaning that the actual inside diameter could vary from 2.245 inches to 1.689 inches.


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How much water does it take to fill a twenty four inch pipe by one foot long?

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