Question

pipe a alone can fill a pole in 15 minutes and pipe B alone can fill it in 10 minutes both pipes are opened after 4 minutes water from pipe p stop flowing in how much time will bite a fill the remaining part of the pool?

Answer 1

Step-by-step explanation:

Portion filled up in 2 hours =

4

1

+

6

1

=

12

5

In 4 hours, portion full =2×

12

5

=

6

5

Remaining portion

6

1

is filled by A in 4×

6

1

=

3

2

hours

∴ Total time =4

3

2

hours