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(pi).(Radius)2.Dpth = 3.14*122*3 = 1356 ft3

(Sorry, I'm not familiar with "ft3 to gallons").

Please note that 'radius' is equal to half of the 'diameter' value

(the squared value of 'half' is 0.25, so a big difference: 340 ft3)

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Q: How many gallons does a 12 ft. radius x a 3 ft deep pool hold?
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