A tank can be filled by two taps `A\ a n d\ B` in 12 hours and 16 hours respectively. The full tank can be emptied by a third tap in 8 hours. If all the taps be turned on at the same time, in how much time will the empty tank be filled up completely?

An empty cistem can be filled by two pipes A and B in 12 minutes and 16 minutes respectively and the full cistem can be emptied by a third pipe C in 8 minnutes. If all the pipes be tumed on at the same time, in how much time will the empty cistern be full ?

A cistern has two inlets A and B which can fill it in 12 hours and 15 hours respectively. An outlet can empty the full cistern in 10 hours. If all the three pipes are opened together in the empty cistern, how much time will they take to fill the cistern completely?

Two taps A and B can fill an overhead tank in 10 hours and 15 hours respectively. Both the taps are opened for 4 hour and then B is turned off. How much time will A take to fill the remaining tank ?

Pipe A can fill an empty tank in 6 hours and pipe B in 8 hours. If both the pipes are opened and after 2 hours pipe A is closed, how much time B will take to fill the remaining tank?

A pipe can fill a cistern in 6 hours. Due to a leak in the bottom it is filled in 7 hours. When the cistern is full, in how much time will it be emptied by the leak?

An oil tank has two pipes connected to it. If the tank is empty, Pipe A can fill it in 2 hours. If the tank is full, Pipe B can empty it in 3 hours. If both pipes are activated at the same time. When the tank is empty, how many hours will it take for the tank to be filled to 60% of its capacity?

Two taps running together can fill a tank in 3(1/13) hours. If one tap takes 3 hours more than the other to fill the tank, then how much time will each tap take to fill the tank ?

Two taps running together can fill a tank in 3(1/13) hours. If one tap takes 3 hours more than the other to fill the tank, then how much time will each tap take to fill the tank ?

A pipe can fill a cistern in 10 hours. Due to a leak in the bottom it is filled in 12 hours. When the cistern is full, in how much time will it be emptied by the leak?

A cistern can be filled by one tap in 4 hours and by another in 3 hours. How long will it take to fill it if both taps are opened together ?