Question 581615
If 5 men takes 10 days, then it would take 
1 man 5 times longer to do the same job
so, 1 man takes 50 days to do it
3 men would take 1/3 of that time, or
50/3 days
{{{ 50/3 = 16 + 2/3 }}}
3 men would take 16 and 2/3 days