If Roshel and Leah work together on a project, they will complete it in 10 days. If Leah were to work with Josiah on the same project, they will take a day longer. If Josiah and Evelyn work together, they will take 100% more time than Roshel and Leah. If Roshel and Evelyn were to work together, how many more days will they take to complete the project compared to Leah and Josiah working together?
Time taken by Roshel and Leah in percent = 100%
Time taken by Josiah and Evelyn = 100% + 100% = 200%

Time taken by Roshel and Leah = 10 days ---- (1)
Time taken by Leah and Josiah = 11 days ---- (2)
Time taken by Josiah and Evelyn = 200% x 10 = 20 days ---- (3)

(1) + (2) + (3)
Roshel + Leah + Leah + Josiah + Josiah + Evelyn → 10 + 11 + 20 = 41 days
Roshel + 2 (Leah + Josiah) + Evelyn → 41 days
Roshel + Evelyn + 2 x 11 → 41 days
Roshel + Evelyn → 41 - 22 = 19 days

More days to complete the project for Roshel and Evelyn compared to Leah and Josiah
= 19 - 11
= 8

Answer(s): 8