Question 951772

There was 12 workers and to complete the job will take 5 weeks and each week is 5 days long.  After 10 days three worker quit.  How many more days extra will it take to finish the job.
<pre>Original number of days to complete job: 5(5), or 25
Number of days 12 workers spent on job: 10
Number of days 9 workers need to complete job: 20
Extra days needed: (10 + 20) - 25, or {{{highlight_green(5)}}}