[Clerk (Morning) Dec, 2021]

6. A Pipe can fill a tank in 6 hours. Another pipe can empty the same tank in 12 hours. If both pipes are opened simultaneously, what part of the tank will be filled in 1 hour?

1. 1/9^th part

2.  1/6^th part

3. 1/12^th part

4. 1/3^rd part

Correct Answer :

1/12^th part