3 pumps , working 8 hours a day, can empty a tank in 2 days. How many – McqOptions

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1.	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
Answer» B. 10

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