If Roshel and Jeremiah work together on a project, they will complete it in 5 days. If Jeremiah were to work with William on the same project, they will take a day longer. If William and Avery work together, they will take 120% more time than Roshel and Jeremiah. If Roshel and Avery were to work together, how many more days will they take to complete the project compared to Jeremiah and William working together?
Time taken by Roshel and Jeremiah in percent = 100%
Time taken by William and Avery = 100% + 120% = 220%

Time taken by Roshel and Jeremiah = 5 days ---- (1)
Time taken by Jeremiah and William = 6 days ---- (2)
Time taken by William and Avery = 220% x 5 = 11 days ---- (3)

(1) + (2) + (3)
Roshel + Jeremiah + Jeremiah + William + William + Avery → 5 + 6 + 11 = 22 days
Roshel + 2 (Jeremiah + William) + Avery → 22 days
Roshel + Avery + 2 x 6 → 22 days
Roshel + Avery → 22 - 12 = 10 days

More days to complete the project for Roshel and Avery compared to Jeremiah and William
= 10 - 6
= 4

Answer(s): 4