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pool gallons 7630.2 How do you get that (D2)x(D2)x3.14 Average depth x 7.5. In your case 18x18x3.14+4x7.5= 7630.2 .

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NO! Sorry, but that lot is all wrong.

The formula for volume is wrong, and there is no addition in it either. The volume of a cylinder is pi*r^2*H (or depth here, for H), where r is the Radius.

So the volume is 3.142 x 9 x 9 x 4 =

1018.01 cubic feet (assuming 4 feet is the water depth and is constant across the pool).

Now multiply that by the number of gallons (US ones?) in 1 cu.ft. to find the water capacity.

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โˆ™ 2016-03-10 21:40:15
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Q: How many gallons of water are needed to fill an 18 ft round x 4 ft deep pool?
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