There is a leak in the bottom of tank which can empty the tank in 8hours if a tap is open to the tank time taken to empty the tank is 12 hours if tap admitted 6liter water perhour find the capacity of tank

Answer 1

you want to try that again in plain English?

Answer 2

the addition of water increases the emptying time by 50%
... so it must increase the apparent volume of the tank by 50%

the added water is 50% (half) of the tank volume