Question 959377
{{{(12men)(8hrs/day)(15days)=1440man-hrs}}}
{{{(1440man-hrs)/((12Men)(10days))=12hrs/day}}}
ANSWER: The men must work 12 hrs/day to finish in 10 days.
{{{(12men)/(8hrs/day)(10days)=960man-hrs}}}
{{{(1440man-hrs)-(960man-hrs)=(480man-hrs)}}}
ANSWER: The men must work a total of 480 extra hours.