# How Much Time will They Take to Complete The Work?

A completes a piece of work in 6 hours. B completes the same work in 12 hours. If both A and B work together, then how much time will they take to complete the work?

- 6 hr
- 8 hr
- 12 hr
- 4 hr

**Answer: (4) 4 hours**

** Explanation:-
**A can complete a piece of work = 6 hours

A can work in an hour = 1/6

B can complete the same work = 12 hours

Then, B can work in an hour = 1/12

Therefore, A and B can together the in an hour = 1/6 + 1/12

= (2 + 1) /12

= 3/12

= 1/4

Then, A and B can together complete the work = 4 hours

Hence, the answer is (4) 4 hours.