SOLUTION: 55 men can finish a piece of work in 42 days. How many additional men must be added to complete the work 9 days earlier..?
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Question 1024283: 55 men can finish a piece of work in 42 days. How many additional men must be added to complete the work 9 days earlier..?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
1 man can finish the job in times that time
or: days
This is: [ 1 job done ] / [ 2310 days ]
------------------------------
Let = additional men to be added
1 man can do this job in times
the time it takes men
rate for 1 man =
----------------------
These rates for 1 man are the same, so:
An additional 15 men are needed to
finish the job 9 days earlier
-------------
check:
rate for 1 man is:
OK
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