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

Answer / vijayalaxmi uppala

m1*d1=m2*d2
30*9=40**d2
270=40*d2
d2=270/40
d2=6.75

Answer / aishu

30*9=40*t2
270/40=t2
ANS:6.75

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

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)

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)

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.

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

Answer / gajendra

30*20*9=40*20*T2
t2=(3*9)/4=6.75=7
so currect answer is 7.

Answer / fox

they should still work 9hr days and get the job done
quicker!

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