A leak in the bottom of a tank can empty the full tank in

A leak in the bottom of a tank can empty the full tank in 6 hours. An inlet pipe fills water at the rate of 4 litres a minute. When the tank is full, the inlet is opened and due to the leak the tank is empty in 8 hours. Find the capacity of the tank.

From the given question ,

Part of tank filled by inlet pipe in 1 hour =	1	-	1	=	4 - 3	=	1
	6		8		24		24

Hence, if there is no leak, the inlet pipe will fill the tank in 24 hours.
∴ Capacity of the tank = 24 × 60 × 4 = 5760 litres