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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
- 35 Answers
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Answer / mv jaysheelan
(30Men x 20days x 9hrs)/(40Men) = 135 hrs per day. Which
is impossible. So, the answer is none.
Since the question is vague, if you don't answer this
question you may be given mark for this question.
The question should have been
1. How many days 40 men working 9 hrs a day will take to
complete the work.
Answer: (30Men x 20days x 9hrs)/(40Men x 9 hrs) = 15days
2. How many hours a day should 40 men work for 20days will
take to complete the work.
Answer: (30hrs x 20day x 9hrs)/(40Men x 20days)=6 3/4 hrs
| Is This Answer Correct ? | 122 Yes | 34 No |
Answer / dhanaraj
days is eqaul....
so calculte power and time..
power 30 hour 9
power 40 hour x
40x=30*9
x=270/40
x=6.75
x=6 3/4
| Is This Answer Correct ? | 56 Yes | 11 No |
Answer / vishal pitaliya
30*20*9=40*20*x
x= (30*20*9)/(40*20)
x= 27/4
x=6 3/4 hrs answer
| Is This Answer Correct ? | 32 Yes | 10 No |
Answer / vidya
In both cases days are same
so
m1*ti=m2*t2
30*9=40*t2
t2=270/40=71/2
| Is This Answer Correct ? | 213 Yes | 192 No |
Answer / suratnarayan tripathi
30*20*9=40*20*x
600*9=800*x
5400=800*x
x=5400/800
x=54/8
x=27/4 Hours
x=6.75 hours
It means
x=7 hour and 15 minutes
| Is This Answer Correct ? | 30 Yes | 19 No |
Answer / sumit sourabh
‎40 men work 6 hours 45 minutes a day for 20 days to complete the job...........
AS WE SEE
(30*20*9)=(40*20*H)
5400=800 * H
H = 6.75 HOURS
I.E; 6 HOURS 45 MINUTES IS THE WORK DONE PER DAY
| Is This Answer Correct ? | 9 Yes | 2 No |
Answer / baddy
equation given: 30 x 9 = 40 x X
=> X = 30 x 9 /40
=270/40
= 6.75
= 6 hrs and 45 mins
So,Ans is
6.75 hrs
| Is This Answer Correct ? | 5 Yes | 0 No |
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