SOLUTION: A certain job can be done by 72 men in 100 days. There were 80 men at the start of the project, there were 30 of them were fired at nth day. So if the workforce of the remaining me
Algebra ->
Rate-of-work-word-problems
-> SOLUTION: A certain job can be done by 72 men in 100 days. There were 80 men at the start of the project, there were 30 of them were fired at nth day. So if the workforce of the remaining me
Log On
Question 1082134: A certain job can be done by 72 men in 100 days. There were 80 men at the start of the project, there were 30 of them were fired at nth day. So if the workforce of the remaining men are to finish the job by 70 days. Find the nth day the lost men were fired. Answer by jorel1380(3719) (Show Source):
You can put this solution on YOUR website! 72 men x 100 days=7200 men in one day, or 1 man does 1/7200 of the job per day. Let n be the number of days 80 men work, and n+70 be the number of days only 50 me worked. Then:
So:
80n/7200+50(n+70)/7200=1
80n+50(n+70)=7200
130n=3700
n=day 28.4615 is the time when 30 of them were fired. ☺☺☺☺
