40 MEN CAN DO A PIECE OF WORK IN 30 DAYS,WORKING 8 HOURS DAILY.IN HOW MANY DAYS WILL 60 MEN FINISH THE WORK WHEN WORKING HOURS ARE REDUCED BY 25 PERCENT? A,19 B,30 C 20 1/3 D,26 2/3

40 men @ 8 hrs/day = 320 man-hrs/day

60 men @ 6 hrs/day = 360 man-hrs/day

So, it will take 320/360 = 8/9 as long, or 80/3 days

7 11 44 49 245 251

a,257 b,1506 c,1368 d,259

if 10 typist working 8 hours take 25 days write 100 letters of 10 lines then how many typist will be working 10 hours take 15 days write 50 letters of 33 lines?

a,15 b,24 c,22 d,20

To solve this problem, we need to consider the work done by the men and the time it takes.

First, let's find the total work done by 40 men in 30 days working 8 hours a day. We can calculate the work done by a man in one day by multiplying the work done in 8 hours with the total number of days:
Work done by a man in a day = Work done in 8 hours * 1 day
Work done in 8 hours = 1/30 (since 40 men can complete the work in 30 days)
Work done by a man in a day = 1/30 * 1 day = 1/30

Next, let's find the total work done by 40 men in 30 days:
Total work done = Work done by a man in a day * Number of men * Number of days
Total work done = 1/30 * 40 * 30 = 40

Now, we need to find out how many days it will take 60 men to finish the work when the working hours are reduced by 25%.

First, let's determine the new working hours after reducing it by 25%:
New working hours = 8 hours - (25% of 8 hours)
New working hours = 8 hours - (0.25 * 8 hours) = 8 hours - 2 hours = 6 hours

Next, let's find the work done by 60 men in one day with 6 hours of work:
Work done by a man in 6 hours = Work done by a man in 8 hours * (6 hours / 8 hours)
Work done by a man in 6 hours = 1/30 * (6/8) = 1/40

Finally, let's find out how many days it will take for 60 men to finish the work:
Number of days = Total work done / Work done by 60 men in one day
Number of days = 40 / (1/40) = 40 * 40 = 1600

Therefore, it will take 60 men, working 6 hours a day, 1600 days to finish the work.

Since none of the given options match this answer, it seems there may be an error in the question or the answer choices provided.