Question 753185
1/24th of the wall gets built each day, by 6 men.  so each man is contributing a 6th of the 1/24th ie, 1/144th.  in other words, each man builds 1/144th of a wall a day.  with 8 men, 8/144th of the wall gets built per day.  this simplifies to 1/18th of a wall (gets build per day by 8 people).  thus the wall will be finished in 18 days