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?

Answers (1)
S safeer

The capacity of the tank is the same. Therefore

3 pumps x 8hours x 2 days = 4 pumps x  y hours x 1 day

y = 12

So 4 pumps working for 12 hours in a day can empty the tank in one day

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