SOLUTION: please answer sir,ma'am"mark contracted 15 skilled workers to finish cementing a certain walk of uniform width in 16 days.after 8 days of work,6 of them got sick and were not repla

Question 347863: please answer sir,ma'am"mark contracted 15 skilled workers to finish cementing a certain walk of uniform width in 16 days.after 8 days of work,6 of them got sick and were not replaced until 4 days after.he wants the job to be on time .how many should he hire?"
thank you
Found 2 solutions by Fombitz, stanbon:
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
Originally, the job required worker-days to complete.
They put in worker-days in 8 days.
The reduced crew of put in worker-days in 4 days.
Look at the worker-days remaining.

.
.
.
76 worker-days of output are required to finish the job.
He has used up days aleready and he has 4 days if he wants to stick to the 16 day schedule.

He needs to have workers to make his schedule.
Since he's already hired workers, he should hire an additional workers.
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
mark contracted 15 skilled workers to finish cementing a certain walk of uniform width in 16 days.
---
Total man-days is 15*16 = 240
-----------------
after 8 days of work 15*8 = 120 man-days of work are completed
----
With 6 men sick for 3 days, the 9 men complete 9*3 = 27 man-days
of work, leaving 93 man-days still to be done.
he wants the job to be on time .how many should he hire?"
---------------
There are 4 days remaining to do 223 man-days of work
93/4 = 24 1/4 men
---
He needs 10 additional men.
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Cheers,
Stan H.

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