Question

It takes 12 people 15 hours to complete and certain job.how many hours would it take 18 people, working at the same rate to complete 2/5 of the same job?

Answer 1

2 Hours

Explanation:

Required man hours to complete the full job = 12 *15

=180 Man hours

Required man hours to complete the 2/5 of the job = 180/5

= 36 Man hours

if 18 peoples are working,

required hours to complete the 2/5 of the job = 36 /18

= 2 hours