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 / dominic
30*20*9=40*20*?
?=30*20*9/40*20
?=5400/600
?=9.
here 10 workers r working extra for 1800hrs(10*20*9)
so add 1800+5400(30*20*9)=7200 total working hrs for 40 workers.
So totalhrs a wokershould work to complete the job within 20
days is = 7200/40*20
=7200/800
=9hrs/day.
| Is This Answer Correct ? | 13 Yes | 49 No |
Answer / teja
in both cases work is constant.
M1*T1=M2*T2
30*20*9=40*T2
T2=135 hrs
go to answers
only 9 can divide the 135.
Ans.d
| Is This Answer Correct ? | 40 Yes | 105 No |
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