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 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?

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?

Two pipes A and B can separately fill a tank in 6 hours and 8 hours , respectively . Both the pipes are opened together , but 1 1/2 hours after the start , the pipe A is turned off. How much time will it take to fill the 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?

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?

Two taps A and B can fill a tank in 15 minutes and 20 minutes respectively.If both the taps are opened simultaneouly, then in how much time can the empty tank be filled ?

Two taps A and B can fill a tank in 15 minutes and 20 minutes respectively.If both the taps are opened simultaneouly, then in how much time can the empty tank be filled ?

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?