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6. A circular swimming pool has a diameter of 24 ft. and a water height of 3.5 ft. A pump can fill the pool at a rate of 1.2 ft cubed (9 gallons) per minute. About how long it will take to fill this pool ( in hours)?

A. About 15 hours

B. About 1300 hours

C. About 88 hours

D. About 22 hours

C. About 88 hours. The area of a circle is π(r)^2 which equals 1,809.56ft^2(substitute r with 24). You multiply that by 3.5 because the height is 3.5 and you get 6,333.46ft^3. You divide that by 1.2 and get 5,277.88, which is how many minutes it would take the pool to fill. You then divide by 60 because there are 60 minutes per hour and you get 87.9≈88. It would take 88 hours to fill this pool

Bis the answer! hope this