Question

a can do a job in 20 days B in 30 days and C in 60 days if a is helped by B and C on every third day then in how many days will the job be finished​

Answer 1

Answer:

15 days

Step-by-step explanation:

work done by A in 1 day is 1/20

work done by B in 1 day is 1/30

work done by C in 1 day is 1/60

The first two days A works alone

1st day=1/20

2nd day=1/20

3rd day=1/20 + 1/30 + 1/60=1/10

In 3 days, 1/10 + 1/20 +1/20 =1/5 work is done

the whole work is done 15 days

Answer 2

Answer:

15 days

Step-by-step explanation:

mark me as brainlist