Question

Pipe A fills in 10 min and pipe B fills in 15 min. If both the pipes are opened for 5

min and Pipe A is closed. How much long will it take to fill the tank.​

Answer 1

Answer:

Time taken by pipe A = 10mins

In 1 minute = 1/10

Time taken by pipe B= 15mins

In 1 minute = 1/15

ATQ

1/10 - 1/15 = 5

15 - 10/15 = 5

5/15 = 5

1/3 = 5

= 3/1*5

= 15 minutes to fill tank alone by tank B