Question

A hemispherical tank full of water is emptied by a pipe at the rate of $\frac{25}{7}$ litres per second. How much time will it take to half-empty the tank, If the tank is 3 metres in diameter?

Answer 1

Volume of half of hemispherical tank

Amount of water emptied by pipe in 1 sec.

So, time taken

To half empty the tank line