APTITUDE

This Test will cover basic concepts of Pipes and Cisterns section of Numerical Computation Topic.

Q. Two pipes A and B can fill a tank in

`20`

and `30`

minutes respectively. If both pipes are used together, then how long will it take to fill the tank?Q. A tap can fill a tank in

`6`

hours. After half the tank is filled, three more similar taps are opened. What is the total time taken to fill the tank completely?Q. A water tank is two-fifth full. Pipe **A** can fill a tank in **B** can empty it in

`10`

minutes and pipe `6`

minutes. If both the pipes are open, how long will it take to empty or fill the tank completely?

Q. Three pipes A, B and C can fill a tank from empty to full in **R** in the liquid in the tank after

`30`

minutes, `20`

minutes and `10`

minutes respectively. When the tank is empty, all the three pipes are opened. A, B and C discharge chemical solutions P, Q and R respectively. What is the proportion of solution `3`

minutes?Q. Two pipes A and B can separately fill a cistern in

`60`

minutes and `75`

minutes respectively. There is a third pipe in the bottom of the cistern to empty it. If all the three pipes are simultaneously opened, then the cistern is full in `50`

minutes. In how much time, the third pipe alone can empty the cistern?Tow taps A and B can fill a tank in

`5`

hours and `20`

hours respectively. If both the taps are opened then, due to the leakage, it took 30 minutes more to fill the tank. If the tank is full, how long will it take for the leakage alone to empty the tank?
Q. Two pipes A and B together can fill a cistern in **B** would have taken **A** to fill the cistern. How much time will be taken by **A** to fill the cistern separately?

`4`

hours. Had they been opened separately, then `6`

hours more than Q. A tank is filled by three pipes with uniform flow. The first two pipes operating simultaneously fill the tank in the same time during which the tank is filled by the third pipe alone. The second pipe fill the tank

`5`

hours faster than the first pipe and `4`

hours slower than the third pipe. The time required by the first pipe is?

Q. Two taps A and B can fill in **A** is closed after **B**?

`12`

minutes and `15`

minutes respectively. If both the taps are opened simultaneously, and the tap `3`

minutes, then how much more time will it take to fill the tank by tap Q. Two pipes A and B can fill in **C** can empty the full tank in **C** is closed. In how much time, will the tank be full?

`15`

hours and `20`

hours respectively while a third pipe `25`

hours. All the three pipes are opened in the beginning. After `10`

hours, A large tanker can be filled by two pipes A and B in **B** is used for half the time and **A** and **B** fill it together for the other half?

`60`

minutes and `40`

minutes respectively. How many minutes will it take to fill the tanker from empty state if Q. Two pipes A and B can fill a cistern in **C** can empty the full tank in **A** and **B** are kept open for **C** is also opened. In what time is the cistern emptied?

`12`

minutes and `15`

minutes respectively, while a third pipe `6`

minutes. `5`

minutes in the beginning and then

Q. Three taps A, B and C can fill a tank in **A** is open all the time and **B** and **C** are open for one hour alternately, the tank will be full in?

`12`

, `15`

and `20`

hours respectively. If Q. A booster pump can be used for filling as well as for emptying a tank. The capacity of the tank is

`2400 m`^{3}

. The emptying capacity of the tank is `10 m`^{3}

per minute higher than its filling capacity and the pump needs `8`

minutes lesser to empty the tank than it needs to fill it. What is the filling capacity of the pump?Q. Two pipes can fill a tank in

`20`

and `24`

minutes respectively and a waste pipe can empty `3`

gallons per minute. All the three pipes working together can fill the tank in `15`

minutes. The capacity of the tank is?