Twenty People did one fourth of a job in eight days. Then because of a building dedication it became necessary to complete the job in the next five dasys. How many more people were added to the crew of twenty to accomplish this task?
Twenty People did one fourth of a job in eight days. Then because of a building dedication it became necessary to complete the job in the next five dasys. How many more people were added to the crew of twenty to accomplish this task?
The work rate of 1 person is r=(1/4)/(8*20) of the job per day.
There is 3/4 of the job remaining, which requires (3/4)/r=480 person days.
If we want to do this work in 5 days we need 480/5=92 people.