SOLUTION: It takes 20 men 8 days to complete 1/4 of the work. How many men are needed to complete all of the work in 5 days?

Question 896519: It takes 20 men 8 days to complete 1/4 of the work. How many men are needed to complete all of the work in 5 days?
Answer by richwmiller(17219) (Show Source): You can put this solution on YOUR website!
After the 20 men after worked 8 days and have finished 1/4 of the job?
20*8=160 man days for 1/4 of the job.
We need to do 3/4 of the job to finish the job.
3*160=480
480/5=96 total men to finish the job in 5 days.
You already have 20 men
96-20=76 more men
96 men total so you need to get another 76 men
or
from the beginning?
20*8=160 for 1/4 of the job.
for the whole job 160*4=640
640/5=128
128

RELATED QUESTIONS
IT TAKES 20 MEN 60DAYS TO COMPLETE A BUILDING WORK, HOW MANY DAYS LONGER WOULD IT TAKES... (answered by josgarithmetic,Alan3354,greenestamps,MathTherapy)

6 men take 4 days to complete a part of a job. how many days will it take 8 men to do the (answered by ankor@dixie-net.com)

20 men can finish a work in 30 days. On completion of 10 days, 10 men leave work.... (answered by richwmiller)

if 5 men complete work in 100 days than how many men complete the same work in 20 days ? (answered by richwmiller)

1.'A' works twice as fast as 'B'. If both of them together take 6 days to complete the... (answered by josmiceli,vvnrichards)

If it takes 64 men 15 days to complete a job, how many more men would be required to... (answered by Alan3354,richwmiller)

28 men can complete a piece of work in 21 days. How many more men must be hired to... (answered by josgarithmetic)

It takes 10 days for 4 men working 6 hours a day to complete some work. How many days... (answered by josgarithmetic)

3 men and 7 women can complete a work in 10 days . But 4 men and 6 women need 8 days to... (answered by josmiceli)