Get Advice on Live Video Call
Earn $ Cash $ with
consultations on Bissoy App

There are three pipes connected to a tank. The first two can fill the tank in 20 minutes and 30 minutes, respectively. The third pipe can empty the entire tank in 5 minutes. If all the pipes are opened simultaneously, what time will it take to empty the tank?

Correct Answer: 8.57 minutes
Let the capacity of the tank be 60 litres. The efficiency of the pipes = 60 / 20, 60 / 30 and 60 / 5 respectively. The efficiency = 3, 2, 12 respectively. The relative efficiency when all the pipes are opened simultaneously = 3 + 2 – 12 = – 7 The time taken to empty the tank = 60 / 7 minutes = 8.57 minutes.

Find the appropriate relation for quantity 1 and quantity 2 in the following question: An artificial kund is filled by three pipes with uniform flow. The first two pipes operating simultaneously fill the kund at the same time during which the kund is filled by the third pipe alone. The second pipe fills the kund 5 hours faster than the first pipe and 4 hours slower than the third pipe. Quantity 1: The time required by the first pipe? Quantity 2: Time taken by all three pipes to fill the Kund simultaneously

A pipe can empty a tank in 2 minutes. Another pipe can empty the tank in 12 minutes, and a third pipe can fill the tank in 22 minutes. What is the time required to empty the tank if all the pipes are opened simultaneously?

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 fills 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:

A pipe, working at full speed, can fill an empty cistern in 1 hour. However, during the first hour it worked at one-twelfth of its capacity, during the second hour at one-ninth of its capacity, during the third hour at one-sixth of its usual capacity and during the fifth hour it was only one -third as efficient as it was supposed to be. A second pipe also displayed similar performance, but if it worked at full speed would have filled the empty cistern in 2 hours. Together with a drain pipe that drained water out of the tank at a constant rate, the empty cistern could be filled in 5 hours, all the three pipes working concurrently. How many hours will it take the drain pipe to empty the filled cistern if no other pipe was functioning during the time?

Out of 3 pipes 2 can fill a tank in 4 minutes and 8 minutes simultaneously. If the third pipe can empty the tank in 12 minutes, find the time taken to fill the tank if all the pipes are opened simultaneously.

Three pipes are opened for 8 minutes each one after the other. The first two pipes can fill a tank in 20 minutes and 40 minutes, respectively. If the third pipe can empty the tank in 120 minutes, find the amount of water filled in the tank after 24 minutes. The tank is 480 litres.

Two pipes A and B can fill an empty cistern in 18 and 27 hours, respectively. Pipe C can drain the entire cistern in 45 hours when no other pipe is in operation. Initially, when the cistern was empty Pipe A and Pipe C were turned on. After a few Pipe A was turned off and Pipe B was turned on instantly. In all, it took 55 hours to fill the cistern. For how many hours was Pipe B turned on?

Two pipes A and B can fill a tank with water in 30 minutes and 45 minutes respectively. The third pipe C can empty the tank in 36 minutes. First A and B are opened. After 12 minutes C is opened. Total time ( in minutes ) in which the tank will be filled up is -

Out of 3 pipes 2 can empty a tank in 20 minutes and 25 minutes, respectively. If the third pipe can fill the tank in 10 minutes, find the time to fill the tank if all the pipes are opened simultaneously.

2 pipes can empty a tank in 70 minutes and 140 minutes, respectively. If a third pipe can fill the tank in 7 minutes, find the time required to fill the tank if all the pipes are opened simultaneously.