Posted by Celina on Monday, May 28, 2012 at 11:11am.
job requires 12(6) = 72 man-hours
They work for 1 hour, so 12 man-hours are used up, leaving 60 man-hours for the job to be done
Second shift has 20 men,
so time needed to complete the job
= 60 man-hours/20 men
= 3 hours
(the above applies only in theory, it does not apply to city workers or the like. Doubling the number of men on a job in practise does not cut the required time in half. , (this is supposed to be a joke) )
Thanks!
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