**can do a piece of work in 6 days and**

__A__**can do the same piece of work in 12 days.**

__B__How many days will they take to complete the work if they work together ?

_____________

**Answer:****4 Days**

A can do 1/6th work in one day.

B can do 1/12th work in one day.

Working together, they can complete - 1/6+1/12 = 3/12 = 1/4 work in one day.

Hence they can complete the same work in

**4 days**if they work together.