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Pipe ‘A’ fills a tank in 25 hours, and pipe ‘B’ empties it in 50 hours. If both are opened together, how much time will it take to fill 80% of ...
Two pipes X and Y can fill a tank in 90 minutes and 60 minutes respectively. A third pipe Z can empty the tank in 2 hours 30 minutes. X is kept closed. ...
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Two inlets X, Y fill the tank in 18 and 9 minutes. Outlet Z is 50% less efficient than X. ‘X’ and ‘Z’ open for 6 minutes, then X is replaced wit...
Pipe A can fill the tank in 12 hours. Pipe A and B together can fill it in 8 hours. Pipe B and C together can fill it in 6 hours. In how many hours will...
A and B can fill a tank in 14 and 21 hours. Pipe C can empty it in ‘x’ hours. All three open together fill the tank in 7 hours. Find x.
Three taps A, B and C can fill a tank in 10, 18 and 6 hours, respectively. If B is open all the time and A and C are open for one hour each alternativel...
Pipe A and B can fill a tank in 36 and 45 hours. Pipe C can empty the tank in ‘x’ hours. If all three are opened, the tank is filled in 60 hours. Fi...
Pipe ‘M’ and pipe ‘N’ can fill a tank alone in 20 hours and 40 hours, respectively. If both pipes are opened together and pipe ‘M’ is close...
A pipe can fill a tank in 6 hours, another can empty it in 9 hours. How long to fill if both work together?
