Question

It takes 5 pipes in 10 minutes to fill a water tank.The time taken to fill the water tank ________ if 7 pipes are used.

Answer 1

Answer:

Clearly,pipe B is faster than pipe A and so,the tank will be emptied.

part to be emptied = 2/5

part emptied by (A+B) in 1 minute=(16−110)=115

115:25::1:x

25*15=6mins

so, the tank will be emptied in 6 min