A pump can fill a chemical storage tank in 3 hours with a leak at the bottom. When the pump operated with the tank leaking for one hour then repaired to close the leakage, it resumed filling the tank...

A pump can fill a chemical storage tank in 3 hours with a leak at the bottom. When the pump operated with the tank leaking for one hour then repaired to close the leakage, it resumed filling the tank for 40 minutes more. how long would it take the pump to operate if there was no leakage in the tank?

o 51.5 minutes
o None of these
o 1 hour
o 1.43 hours
o 2.14 hours