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Area of a circle is Pi x radius squared. So area is 7.5^2 * 3.1416. Volume, multiply by 3.5 feet, since a pool like this doesn't fill to the full 4 ft depth. That makes a volume of 618.5 cubic feet. There are 7.48 gallons in a cubic foot, so this comes out to 4626 gallons for a pretty reasonable estimate.

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13y ago

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