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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 / sneha aitha
30 men-20 days-9 hours
40 men- ? - ?
so m1 d1 h1 = m2 d2 h2
30*20*9 = 40*d2*h2
m1d1=m2d2
30*20=40*d2 then d2=15
30*20*9=40*15*x
so then x=9hrs
| Is This Answer Correct ? | 0 Yes | 0 No |
Answer / vijayalaxmi uppala
m1*d1=m2*d2
30*9=40**d2
270=40*d2
d2=270/40
d2=6.75
| Is This Answer Correct ? | 0 Yes | 0 No |
Answer / praveen
30 * 20 * 9 = 5400 man-hours required to complete the job
Let x = no. hrs a day to do the same job (assuming in 20 days)
40 * 20 * x = 5400
800x = 5400
x = 5400%2F800
x = 6.75 hrs a day for 20 days to do the same job
| Is This Answer Correct ? | 0 Yes | 0 No |
Answer / jyosna
30 * 20 * 9 = 5400 man-hours required to complete the job
:
Let x = no. hrs a day to do the same job (assuming in 20 days)
40 * 20 * x = 5400
800x = 5400
x = 5400%2F800
x = 6.75 hrs a day for 20 days to do the same job
SO THE ANSWER IS 7HRS(approx)
| Is This Answer Correct ? | 0 Yes | 0 No |
Answer / yashwanth krishna
If the question is "how many hours should 40 men work to complete the same work done by 30 men working 9 hrs a day for 20 days?" then my answer would be,
if 30 men can finish a PIECE OF WORK in 20days then
1man's work will be 1/30for 20days and 1/30*20=1/600 is one man's 1 day work
then 40 men's 1 day's work is 40/600
and 40 men can do the work in 600/40 days=15days(working 9 hours a day)
which is 135hours(15*9)
if the work is to be completed in 20 days then 40 men should work 6.75hrs a day(135/20)
| Is This Answer Correct ? | 0 Yes | 0 No |
Answer / rahul parmar
30 x 20 x 9 = 5,400 man hours required for the job
You’ve given us 40 men and 20 days:
5400 / 40 / 20 = 6.75
So they would have to work 6.75 hours a day to complete the job.
| Is This Answer Correct ? | 0 Yes | 0 No |
Answer / muthuganesan
while increase the men, the working days will be decreased,
but the working hours would be the same, nobody decrease the
working hour in their organization.
so answer would be a) 9 hrs
| Is This Answer Correct ? | 1 Yes | 3 No |
Answer / gajendra
30*20*9=40*20*T2
t2=(3*9)/4=6.75=7
so currect answer is 7.
| Is This Answer Correct ? | 4 Yes | 10 No |
Answer / fox
they should still work 9hr days and get the job done
quicker!
| Is This Answer Correct ? | 9 Yes | 41 No |
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