# In How much Time All the Three Finish Work?

Three person A, B and C can do a piece of work in 15 days, 6 days and 10 days respectively. In how many days will all the three finish 3 times the similar work?

- 3 days
- 9 days
- 6 days
- 4 days

**Answer: (b) 9 days**

**Explanation:-**

A person can do a piece of work in 15 days.

Therefore A person can do work in a day = 1/15

B person can do same work in 6 days.

Therefore B person can do work in a day = 1/6

C person can do same work in 10 days.

Therefore c person can do work in a day = 1/10

All together can do work = 1/15 + 1/6 + 1/10 = 10/30

= 1/3

Hence, the altogether can do piece of work in 3 days.

All together can do three times of work = 3 x 3 = **9 days.**