Question

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?

Answer 1

heya frnd

If three pumps working together 8 hours a day can empty a tank in 2 days

. it means the volume of the tankis such that it requires pumping of3*8*2 = 48 pump-day-hours. 48 pump-day-hours/4pump-day = 12 hours.

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

Answer 2

4 pumps working 12 hours a day can empty the tank