Question

9. A can do a job in 20 days, B in 30 days and C in 60 days. If A is helped by B and Con every third day,
then in how many days will the job be finished?

STEP BY STEP EXPLANATION PLEASE​

Answer 1

Answer:

Step-by-step explanation:

Per day A can complete 1/20 , B can complete 1/30 and C can complete 1/60 of the job.

Since B and C helps A on every third day, in three days they can complete (3/20+1/30+1/60) =1/5

Therefore to complete the job they need=3*5/1=15 days

Answer 2

Answer:

15 days

On first two days A will work & on third day A will work with B & C,

So three days work of A,B and C= (1/20)+(1/20)+[(1/20)+(1/30)+(1/60)]=1/5

Whole work will be completed in 3/(1/5)=15 days

Step-by-step explanation:

hope it helps explanation is in answer .