A tap A can fill a cistern in 4 hours and the tap B can empty the full cistern in 6 hours. If both the taps are opened together in the empty cistern, in how much time will the cistern be filled up?

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?

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?

Tap A can fill a tank in 6 hours and tap B can empty the same tank in 10 hours. If both taps are opened together, then how much time (in hours) will be taken to fill the rank?

A tap can fill a tank in 10 hours and another tap can empty the tank in 15 hours. If both the taps are opened together how much time will be taken to fill (2)/(3) of the tank.

A tap can fill an empty tank in 48 minutes whereas another tap can empty the full tank in 2 hours. If both the taps are opened at 11:40 a.m., when will the empty tank be filled ?

One tap can fill a cistern in 2 hours and another can other can empty the cistern in 3 hours. How long will they take to fill the cistern if both the taps are opened ?

Tap A can fill a tank in 10 hours and tap B can fill same tank in 12 hours .Tap C can empty the same full tank in 6 hours .If all the taps are opened together,then what what portion of the tank will be filled after 6 hours ?

One tap can fill a cistern in 3 hours and the waste pipe can empty the full cistern in 5 hours. In what time will the empty cistern be full, if the tap and the waste pipe are kept open together ?