I'm trying to determine the footprint (PSI) of a 15 foot diameter swimming pool. To do so, I need to convert the circle into square feet (I think) then knowing that water weighs approx 8 lbs per gallon, and the capacity is 5300 gallons, I have 42,400 lsbs total. but now I need the conversion to square feet. Can you help?
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conversion of a diameter to square feet.