Question 278113
it takes 5 men 3 hours to do a job; if 3 men do the same job how long will it take?
:
Find how many man-hrs required to do the job
5*3 = 15 man-hrs
:
Find how many hrs it takes 3 men to do the same job
3h = 15
h = 15/3
h = 5 hrs