Question

4. A and B can do a piece of work in 12 days
B and C in 15 days and C and A in 20 days
In how many days A, B and C together can do
the work?​

Answer 1

Step-by-step explanation:

If a person takes m days to complete a work then wirk done in 1 day is 1/m

conversley if a person 1 day work is 1/m

tjen total no of days taken by him to complete the work is m