Question

60 workers can complete a work in 21 days. How long will it take to complete the some work if 10 more workers were added?​

Answer 1

Explanation:

set 1 is the work, then 60 works finish 1/21 per day.
`(1)/(21*60)` is the work for per workers. so, the days for 70 workers is
`(21*60)/(70)=18` days.

it will spend 18 days to complete