SOLUTION: If m men can do a job in d days,how long will it take (m+r)?

Question 1010284: If m men can do a job in d days,how long will it take (m+r)?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
One man will take times as long
to do the same job, so, the rate of working
for 1 man is:
[ 1 job ] / [ d * m days ] =
--------------------
More men will get the job done faster, so the new rate is
[ m + r men ] x [ rate for 1 man ] =
--------------------
Now convert this to [ 1 job ] / [ time to do the job ]
by dividing top and bottom by
---------------------------
men will take days
to do the job
------------------
You can get a 2nd opinion on this. I think I'm OK though
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