A leak empties a full tank in 6 hours. When a tap letting in 4 litres a minute is also opened, the full tank empties in 8 hours. What is the capacity of the tank?

Explanation

1. 01

   4 litres a minute is 240 litres an hour. With capacity $C$: $\frac{C}{6} - 240 = \frac{C}{8}$.

2. 02

   $\frac{C}{24} = 240$, so $C = 5{,}760$ litres.