Question

if a job takes 12 workers 4 hours to complete,how long should it take 15 workers to complete the job?​

Answer 1

Answer:

If 12 worker takes 4 hour to work.

Hence.. 1 worker takes 30 minute to work

Hence 15 worker takes 5hour 30 min to complete.

Answer 2

3 hrs. 12 minutes.

STEP BY STEP EXPLANATION

12 Workers complete a job in 4 hours

1 worker complete a job 12×4 = 48

15 workers complete a job = 48/15= 3³/¹⁵ = 3¹/⁵

= 3 hours+1/5×60

minutes= 3hours 12 minutes.