Question 948439

 A vineyard’s grapes can be harvested by 10 workers in 5 hours. If one worker starts the 
harvest at noon, and another worker joins the harvest each hour on the hour, at what time 
will the harvest be completed?
<pre>Time taken to do entire job: 12 hours
Time job completed: {{{highlight_green(system(12:00_AM_or,midnight))}}}