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?
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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.
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.
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4 pumps working 12 hours a day can empty the tank
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