SOLUTION: A certain number of men can complete a job in 10 days. if 10 man are absent, the remaining men can do the job in 12 days.how many men were there originaly?

Question 942172: A certain number of men can complete a job in 10 days. if 10 man are absent, the remaining men can do the job in 12 days.how many men were there originaly?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Let = the original number of men
1 man can complete the job in days
His rate is , or ( 1 job ) / ( 10n days )
----------------------
If men can do the job in 12 days,
then 1 man can do the job in
days
Each man's rate is:
-------------------------------------
Each man's rate didn't change, so

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there were 60 men originally
check:
60 men can do a job in 10 days
1 man can do the job in 600 days
His rate is
-----------------------------
men can do the job in 12 days
1 man can do the job in days
His rate is
OK
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