5 workers can complete a work in 20 days. In how many days can 10 workers complete the same work ?
5 workers can complete the work in 20 days
Number of days taken by one worker to complete the same work is
= 5 ⋅ 20 days
= 100 days
Number of days taken by 10 workers to complete the same work is
= 100 / 10 days
= 10 days
So, 10 workers can complete the work in 10 days.