Question

A can do a work in 12 days, b can do it in 18 days and c can do the same in 36 days. a and b start the work, c joins 5 days later and b leaves 2 days before completion of the work. in how many days is the work done

Answer 1

We will use the LCM technique to solve this.

A takes 18 days to complete the task whereas B takes 15 days to complete.

Let the TOTAL WORK = 90 Units

So, A does 5 Units/day

B does 6 Units/day

B worked for 10 days and left the job. So, work doine by B = 60 Units

Remaining Work = 30 Units.

Thus, A will take = 305305 = 6 Days (Answer)