Pipes and Cistern
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Q. A tank is filled by two pipes A and B in 12 hours and 16 hours respectively. If pipe A is opened for 4 hours and then pipe B is opened, how long will it take to fill the tank?
Q. A tank is filled by two pipes A and B in 15 hours and 20 hours respectively. If both pipes are opened together, how long will it take to fill the tank?
Q. A tank is filled by two pipes A and B in 15 hours and 25 hours respectively. If both pipes are opened together, how long will it take to fill the tank?
Q. A tank is filled by two pipes 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. A tank is filled by two pipes in 12 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 completely?
Q. A tank is filled by two pipes in 12 hours and 16 hours respectively. If both pipes are opened together, how long will it take to fill the tank?
Q. A tank is filled by two pipes in 15 and 20 minutes respectively. If both pipes are opened together, how long will it take to fill the tank?
Q. A tank is filled by two pipes in 18 hours and 24 hours respectively. If both pipes are opened together, how long will it take to fill the tank?
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. A tank is filled by two pipes in 9 hours and 12 hours respectively. If the first pipe is opened for 3 hours and then the second pipe is opened, how long will it take to fill the tank?
Q. A tank is filled by two pipes in 9 hours and 18 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 cistern is filled by two pipes 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 15 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 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 5 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 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 4 hours and emptied by another pipe 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 6 hours and another pipe can empty it in 4 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 6 hours and emptied by another pipe in 4 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 6 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?