3 pumps, working 8 hours a day, can empty a tank in 2 days. How many hours a day must 4 pumps work to empty the tank in

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Q 1412145030.     3 pumps, working 8 hours a day, can empty a tank in 2 days. How many hours a day must 4 pumps work to empty the tank in 1 day?
A

9

B

10

C

11

D

12

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Solution
(Provided By a Student and Checked/Corrected by EXXAMM.com Team)

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