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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

Answers were Sorted based on User's Feedback



Thirty men take 20 days to complete a job working 9 hours a day. How many hour a day should 40 men ..

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

Thirty men take 20 days to complete a job working 9 hours a day. How many hour a day should 40 men ..

Answer / boopathi

m1*d1*h1=m2*d2*h2
30*20*9*60=40*20*h2
5400*60=800*h2
(54*60)/8=h2
ans=9 hrs

Is This Answer Correct ?    14 Yes 65 No

Thirty men take 20 days to complete a job working 9 hours a day. How many hour a day should 40 men ..

Answer / rupesh

9 hrs

Is This Answer Correct ?    57 Yes 119 No

Thirty men take 20 days to complete a job working 9 hours a day. How many hour a day should 40 men ..

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

Thirty men take 20 days to complete a job working 9 hours a day. How many hour a day should 40 men ..

Answer / dfsdfs

8hrs

Is This Answer Correct ?    7 Yes 73 No

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