A water tank can be filled by a tap in 30 minutes and another tap can fill it in 60 minutes. If both the taps are kept open for 5 minutes and then the first tap is closed, how long will it take for the tank to be full? [A]20 minutes [B]25 minutes [C]30 minutes […]
Pipe P and Q can fill a tank in 10 and 12 hours respectively and C can empty it in 6 hours. If all the three are opened at 7 am, at what time will one-fourth of the tank be filled? [A]10 am [B]11 am [C]10 pm [D]11 pm Show Answer 10 pm Part of […]
A pipe can fill a tank in x hours and another can empty it in y hours. In how many hours they can together fill it (where y > x) : [A] [B] [C] [D] Show Answer When both pipes are opened simultaneously, part of the tank filled in 1 hour ∴ Required time Hence […]
There are two pumps to fill a tank with water. First pump can fill the empty tank in 8 hours, while the second in 10 hours, If both the pumps are opened at the same time and kept open for 4 hours, the part of the tank that will be filled up is : [A] […]
Two pipes A and B can separately fill a tank in 2 hours and 3 hours respectively. If both the pipes are opened simultaneously in the empty tank, then the tank will be filled in: [A]1 hour 12 minutes [B]1 hour 15 minutes [C]1 hour 20 minutes [D]2 hours 30 minutes Show Answer 1 hour […]
A cistern has two pipes. One can fill it with water in 8 hours and other can empty it in 5 hours. In how many hours will the cistern be emptied if both the pipes are open together when of the cistern is already full of water? [A] [B] [C] [D] Show Answer Part of […]
Three pipes A, B and C can fill a tank in 6 hours, 9 hours and 12 hours respectively. B and C are opened for half an hour, then A is also opened. The time taken by the three pipes together to fill the remaining part of the tank is : [A]2 hours [B]2.5 hours […]
If of a cistern is filled in 1 minute, the time needed to fill the rest is : [A]24 sec [B]30 sec [C]36 sec [D]40 sec Show Answer 40 sec Time taken to fill the of the cistern = 60 seconds ∴ Time taken in filling part Hence option [D] is correct answer.
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? [A] [B] [C] [D] Show Answer Part of the tank filled by pipe A […]
A cistern is provided with two pipes A and B. A can fill it in 20 minutes and B can empty it in 30 minutes. If A and B be kept open alternately for one minute each, how soon will the cistern be filled? [A]110 minutes [B]115 minutes [C]120 minutes [D]121 minutes Show Answer 115 […]