# In How Many day A, B and C can Together can Complete it? if

A and B together can complete a piece of work in 12 days, B and C can do it in 20 days and C and A can do it in 15 days. A, B and C together can complete it in

- 6 days
- 9 days
- 10 days
- 10.5 days

**Answer: (3) 10 days**

**Explanation:-**

A and B can together complete the work = 12 days

A and B can do together work in a day = 1/12

B and C can complete the work = 20 days

B and C can do the work in a day = 1/20

C and A can complete the work = 15

C and A can do the work = 1/15

A, B and C can do together work in a day = (1/12 + 1/20 + 1/15) /2

= ( 5 + 3 + 4)/60 x 2

= 12/60 x 2

= 1/2 x 5

1/10

Then, A B & C can do complete the work = 10 days.

Hence, the answer is (3) 10 days.