Question 242964
It takes 18 men 6 hours to dig a trench 720 feet long.
 Working at the same rate, how many feet of trench can be dug by 24 men in 8 hours?
:
We can use man-hrs here.
:
18*6 = 108 man-hrs for 720 ft
that's
{{{720/108}}} = 6{{{2/3}}} ft per man-hr
:
24 * 8 * 6{{{2/3}}} = 1280 ft