Question

There are two taps in a tank. One tank is there for filling water in the tank and second is used for ejecting water from it. The first tap can fill the tank in 8 hours whereas second tap requires 10 hours for making the tank empty. If both taps are used together, hours required for filling the complete tank will be

Answer 1

The tank will be filled in2 hours

Answer 2

I think it's 2 hours