Question

Two pumps working 7 hours a day to empty a tank in 3 days how many hours a day must 3 pumps work to empty a tank in one day

Answer 1

How many Work hours



Two pumps have to work 21*2 = 42 hours to empty the tank That is 21 X = 42

Where X is the Time in days

One pump will take 84 hours

3 pumps will take 84/3 = 27 hours