Question

current can do a piece of work in 14 days while B can do it 21 days then begin together and work for 16th April behind to complete the remaining work alone how many days the work completed​

Answer 1

First of all we convert it in unit like this

20 workers × 30 days = 600 units work

After leave the 5 workers , we have 35 days for complete the work.

In 35 days only 15 workers will do the work.

So the work completed in 35 days by 15 workers = 35 ×15 =525 units

Remaining unit = 600 -525 =75 units

This units would done by 5 workers in ( 75/5) = 15 days .

So after 15 days 5 workers should leave the job.