Q: Two pipes B and F can fill the tank in 10 hours and 15 hours, respectively. If both the pipes are opened along with an outlet pipe M, then the tank is filled in 30 hours. Help me to find out how much time will the outlet pipe take to empty the full tank.
A: 7.5
Q: A large cistern can be filled by two pipes P and Q in 15 minutes and 20 minutes respectively. How many minutes will it take to fill the Cistern from an empty state if Q is used for half the time and P and Q fill it together for the other half?
A: 12 min
Q: A water tank is two-fifth full. Pipe A can fill a tank in 12 minutes and pipe B can empty it in 6 minutes. If both the pipes are open, how long will it take to empty or fill the tank completely?
A: 4.8 min
Q: Pipe X fills a tank in 36 minutes and Y in 60 minutes. Pipe Z empties the tank in 24 minutes. Find the time taken to fill (5/12)th of the tank if all three pipes are opened together.
A: 150 minutes
Q: Pipe A and B running together can fill a cistern in 6 minutes. If B takes 5 minutes more than A to fill the cistern, then what will be the respective times in which A and B will fill the cistern separately ?
A: 10 min, 15 min
Q: Three pipes A, B and C can fill a cistern in 10 hours, 12 hours and 15 hours respectively. First A was opened. After 2 hour, B was opened and after 4 hours from the start of A, C was also opened. Find the time in which the cistern is full.
A: 5 hours 44 min
Q: A tap can fill a tank in 4 hours. After half the tank is filled, two more similar taps are opened. What is the total time taken to fill the tank completely?
A: 2 hr 40 min
Q: Pipe A fills a tank in 30 minutes. Pipe B can fill the same tank 5 times as fast as pipe A. If both the pipes were kept open when the tank is empty, how much time will it take for the tank to overflow?
A: 5 min
Q: Pipe A and Pipe B can fill a cistern in 10 hours and 15 hours respectively. When a third pipe C which works as an outlet pipe is also open then the cistern can be filled in 18 hours. The outlet pipe can empty a full cistern in :
A: 9 hours
Q: 9 identical pipes take 70 minutes to fill a tank. If two of the pipes don’t work, then how much time would it take remaining pipes to fill the tank?
A: 90 minutes
Q: Two pipes A and B can fill a tank in 15 min and 20 min respectively. Both the pipes are opened together but after 4 min, pipe A is turned off. What is the total time required to fill the tank ?
A: 14 min 40 sec
Q: A tank is filled by a pipe in 15 minutes. But due to leak, it takes 5 more minutes to fill. Leakage pipe empties at the rate of 6 litres/minute. Find the capacity of the tank.
A: 360 litres
Q: Three taps A, B and C can fill a cistern in 12, 15 and 18 min respectively. They are all turned on but after 4.5 minutes A and C are turned off. How many more minutes will B take to fill the cistern?
A: 1.125 min
Q: Pipe P fills a tank in 10 hours and Q in 20 hours and R empties it in 30 hours. Two more similar emptying pipes are added with them. Find the time taken to fill the fill the half of the tank.
A: 10 Hours
Q: Pipe A can fill a tank in 8 hours. On account of a leak at the bottom of the tank it takes thrice as long to fill the tank. How long will the leaks at the bottom of the tank take to empty a full tank, when pipe A is kept closed?
A: 12 hours
Q: Pipes A and B can fill a cistern in 15 hours together. But if these pipes operate separately A takes 40 hours less than B to fill the tank. In how many hours the pipe A will fill the cistern working alone?
A: 20 hours
Q: Two pipes can fill a tank in 24 and 18 minutes respectively and a waste pipe can empty the tank in some time. All three pipes working together can fill the tank in 12 minutes. How much time is taken by the waste pipe to empty the full tank?
A: 72
Q: Two pipes A and B can fill a cistern in 37 (1/2) minutes and 45 minutes respectively. Both pipes are opened. The cistern will be filled in just half an hour, if the B is turned off after
A: 9 min
Q: Two pipes can fill a cistern in 10 and 8 minutes respectively while a third pipe can empty it in 5 min. How long will it take to fill the empty cistern if all three pipes are opened simultaneously?
A: 40 min
Q: Pipe A can fill a tank in 16 minutes and pipe B can empty it in 24 minutes. If both the pipes are opened together after how many minutes should pipe B be closed so that the tank is filled in 30 minutes?
A: 21 min