Thirty men take 20 days to complete a job working 9 hours a
day. How many hour a day should 40 men work to complete the job?
(a) 8 hrs
(b) 7 1/2 hrs
(c) 7 hrs
(d) 9 hrs
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Answer Posted / pradipta
30 men takes 20 days & 9 hour to complete 1 job
(Here days constant, only hour is asked)
So 30 men, Each day 9 hour, 20 days =9*20=180 hrs
Den 1 men takes 180*30=5400 hrs
Therefore 40 men will take 5400/40=135hours in 20 days
=135/20=6.75 hours each day
Answer is c (approximately 7 hour)
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