If Julie and Elizabeth work together on a project, they will complete it in 10 days. If Elizabeth were to work with Riordan on the same project, they will take a day longer. If Riordan and Ella work together, they will take 160% more time than Julie and Elizabeth. If Julie and Ella were to work together, how many more days will they take to complete the project compared to Elizabeth and Riordan working together?
Time taken by Julie and Elizabeth in percent = 100%
Time taken by Riordan and Ella = 100% + 160% = 260%

Time taken by Julie and Elizabeth = 10 days ---- (1)
Time taken by Elizabeth and Riordan = 11 days ---- (2)
Time taken by Riordan and Ella = 260% x 10 = 26 days ---- (3)

(1) + (2) + (3)
Julie + Elizabeth + Elizabeth + Riordan + Riordan + Ella → 10 + 11 + 26 = 47 days
Julie + 2 (Elizabeth + Riordan) + Ella → 47 days
Julie + Ella + 2 x 11 → 47 days
Julie + Ella → 47 - 22 = 25 days

More days to complete the project for Julie and Ella compared to Elizabeth and Riordan
= 25 - 11
= 14

Answer(s): 14