Question

11. Pipe A can fill a cistern in 6 hours and pipe B can fill the same cistern in 10 hours. Find the time taken to fill the
cistern, if both the taps are opened together

Answer 1

Step-by-step explanation:

Part of the tank filled by pipe A and B in 2 hrs.

=2(

6

1

+

8

1

)=2(

24

4+3

)=

12

7

Remaining part =1−

12

7

=

12

5

, This part is filled by pipe B.

∴ Required time =

12

5

×8=

3

10

=3

3

1

hrs.