Question

A pipe can fill a tank in 15 minutes and the tap at bottom of a tank can drain water at the rate of 4 litre per minute if both the pipe and tap are opened together then they can fill the tank in 20 minutes .Find the capacity of the tank?​

Answer 1

Answer:

60 litres

Time to fill the tank with pipe = 15 min

Drain per minute = 4 litre per min

Total capacity -= 15 x 4 = 60 litres