Question 833221: It takes 5 hours for 6 people to landscape a yard. How long will it take 4 people to do the same job? Answer by JulietG(1812) (Show Source):
You can put this solution on YOUR website! If it takes 5 hours and 6 people, it takes 5*6 = 30 man-hours.
Divide that by 4 people to get 30/4 = 7.5 hours