# In How Many days B Alone can do it? If

A and B can together do a piece of work in 18 days and A alone can do it in 36 days. In how many days B alone can do it?

- 35 days
- 25 days
- 36 days
- 39 days

**Answer: (3) 36 fays**

**Explanation:-**

A and B can together do a piece of work = 18 days

A and B can together do a piece of work in a day = 1/18

A alone can do it = 36 days

A alone can do work in a day = 1/36

B alone can do the work in a day = 1/ 18 – 1/36

= (2 – 1) /36

= 1/36

Then, B can complete the work = 36 days.

Hence, the answer is (3) 36 days.