Pipes and Cistern
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Q. A tank is filled by two pipes in 8 hours and 12 hours respectively. If both pipes are opened together, how long will it take to fill the tank?
Q. If a cistern is filled by two pipes A and B in 12 hours and 15 hours respectively, how long will it take to fill the cistern if both pipes are opened together?
Q. If a pipe can fill a tank in 20 hours and another pipe can empty it in 25 hours, how long will it take to fill the tank if both pipes are opened together?
Q. If a pipe can fill a tank in 20 minutes and another pipe can empty it in 30 minutes, how long will it take to fill the tank if both pipes are opened together?
Q. If a pipe can fill a tank in 24 hours and another pipe can empty it in 30 hours, how long will it take to fill the tank if both pipes are opened together?
Q. If a pipe can fill a tank in 25 minutes and another pipe can empty it in 50 minutes, how long will it take to fill the tank if both pipes are opened together?
Q. If a pipe can fill a tank in 9 hours and another pipe can fill it in 6 hours, how long will it take to fill the tank if both pipes are opened together?
Q. If a tank can be filled by a pipe in 20 hours and emptied by another pipe in 30 hours, how long will it take to fill the tank if both pipes are opened together?
Q. If a tank can be filled by a pipe in 20 minutes and emptied by another pipe in 30 minutes, how long will it take to fill the tank if both pipes are opened together?
Q. If a tank can be filled by a pipe in 25 minutes and emptied by another pipe in 50 minutes, how long will it take to fill the tank if both pipes are opened together?
Q. If a tank can be filled by a pipe in 3 hours and emptied by another pipe in 9 hours, how long will it take to fill the tank if both pipes are opened together?
Q. If a tank can be filled by a pipe in 8 hours and emptied by another pipe in 12 hours, how long will it take to fill the tank if both pipes are opened together?
Q. If a tank is filled by a pipe in 5 hours and another pipe can empty it in 10 hours, how long will it take to fill the tank if both pipes are opened for 2 hours?
Q. If a tank is filled by a pipe in 5 hours and emptied by another pipe in 10 hours, how long will it take to fill the tank if both pipes are opened together?
Q. If a tank is filled by a pipe in 7 hours and emptied by another pipe in 14 hours, how long will it take to fill the tank if both pipes are opened together?
Q. If pipe A can fill a tank in 10 hours and pipe B can fill it in 15 hours, how long will it take to fill the tank if both pipes are opened together?
Q. Pipe A can fill a tank in 15 hours, and pipe B can fill the same tank in 20 hours. If both pipes are opened together, how long will it take to fill the tank?
Q. Pipe A can fill a tank in 15 hours, while pipe B can fill it in 10 hours. If both pipes are opened together, how long will it take to fill the tank?
Q. Pipe A can fill a tank in 6 hours, and pipe B can fill the same tank in 9 hours. If both pipes are opened together, how long will it take to fill the tank?
Q. Pipe A can fill a tank in 6 hours, while pipe B can empty it in 4 hours. If both pipes are opened together, how long will it take to fill the tank?
Q. Pipe A can fill a tank in 6 hours, while pipe B can fill it in 4 hours. If both pipes are opened together, how long will it take to fill the tank?
Q. Pipe A can fill a tank in 6 hours, while pipe B can fill it in 9 hours. If both pipes are opened together, how long will it take to fill the tank?
Q. Three pipes can fill a tank in 6, 8, and 12 hours respectively. If all three pipes are opened together, how long will it take to fill the tank?
Q. Two pipes A and B can fill a tank in 12 hours and 18 hours respectively. If both pipes are opened together, how long will it take to fill the tank?
Q. Two pipes can fill a tank in 10 hours and 15 hours respectively. How long will it take to fill the tank if both pipes are opened together?
Q. Two pipes can fill a tank in 10 hours and 15 hours respectively. If both pipes are opened together, how long will it take to fill the tank?
Q. Two pipes can fill a tank in 10 hours and 15 hours respectively. If the first pipe is opened for 5 hours and then the second pipe is opened, how long will it take to fill the tank?
Q. Two pipes can fill a tank in 18 hours and 24 hours respectively. If both pipes are opened together, how long will it take to fill the tank?
Q. Two pipes can fill a tank in 20 hours and 30 hours respectively. If both pipes are opened together, how long will it take to fill the tank?
Q. Two pipes can fill a tank in 4 hours and 6 hours respectively. If both pipes are opened together, how long will it take to fill the tank?
