Pipes A and B can fill an empty tank in 10 hours and 15 hours respectively. If both are opened together in the empty tank, how much time will they take to fill it completely?

Pipes A and B can fill a tank in 5 hours and 20 hours respectively. If both pipes are opened then, how much time (in hours) it will take to fill the tank?

Two taps A and B can fill a tank in 10 hours and 15 hours, respectively .If both the taps are opened together the tank will be filled in how many hours?

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?

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 a tank in 30 hours and pipe B in 45 hour.If both the pipes are opened in an empty tank how much time will they take to fill it?

A tank has two inlets which can fill it in 6 hours and 8 hours, respectively. An outlet can empty the full tank in 10 hours. If all three pipes are opened together in an empty tank how much time will they take to fill the tank completely? (a) 5(5)/(46) hours (b) 6 (5)/(23) hours (c) 6 (5)/(46) hours (d) 5 (5)/(23) hours

Pipe A can fill an empty tank in 5 hours while pipe B can empty the full tank in 6 hours.If both are opened at the same time in the empty tank,how much time will they take to fill it up 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?