Three small pumps and one large pump are filling a tank Each of the three small pump works at 2 3 of...........

Quantitative Aptitude ( CCS) Pipes&cistern

Three small pumps and one large pump are filling a tank. Each of the three small pump works at 2/3 of the rate of the large pump. If all four pumps work at the same time, they should fill the tank in what fraction of the time that it would have taken the large pump alone?

4/3

1/3

2/3

3/4

छोटे Courses बड़े Results

Master Pipes&cistern

Prepare through Micro-courses

Try Now

Explanation:

Capacity of three small pumps = Capacity of two large pumps

Also, if we want to express the capacity of three small pumps + one large pump in terms of large pump, we should add one large pump on both sides of the above equation

Adding one large pump on both sides of the above equation, we get

Three small pumps + one large pump = Three large pumps.

Thus, if all the four pumps are open together, they would fill the tank in 1/3 rd of the time large pump would have taken alone.

Hence, option 2 is the correct answer.