# How much time they will take, if they work together ?

Ram completes a task in 10 hours and system also completes the same task in 15 hours. How much time they will take, if they work together ?

- 6 hrs.
- 4 hrs.
- 9 hrs.
- 8 hrs.

**Answer: (1) 6 hrs. **

**Explanation:-**

Ram completes a task = 10 hours

A system also completes the same task = 15 hours

They will take time work together = 10 x 15/(10 + 15)

= 150/25

= 6 hrs.

Hence, the answer is (1) 6 hrs.