Question

A cistern can be filled by one tap in 3 hr and another by 5 hr how long will it take to fill if both taps are opened together...
please send it's solution​

Answer 1

Answer:

We have,

Time taken by the first tap to fill the cistern =4 hours.

Time taken by the second tap to fill the cistern =3 hours

Work done by the first tap in 1 hour =

4

1

Work done by the second tap in 1 hour =

3

1

Thus, work done by both the taps in 1 hour =

4

1

+

3

1

=

12

3+4

=

12

7

Both the taps together will fill the cistern in

7

12

hours.

Answer 2

Answer:

Both the taps will take 4 hrs