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

Time taken by Robert and Elijah = 10 days ---- (1)
Time taken by Elijah and Nora = 11 days ---- (2)
Time taken by Nora and Olivia = 260% x 10 = 26 days ---- (3)

(1) + (2) + (3)
Robert + Elijah + Elijah + Nora + Nora + Olivia → 10 + 11 + 26 = 47 days
Robert + 2 (Elijah + Nora) + Olivia → 47 days
Robert + Olivia + 2 x 11 → 47 days
Robert + Olivia → 47 - 22 = 25 days

More days to complete the project for Robert and Olivia compared to Elijah and Nora
= 25 - 11
= 14

Answer(s): 14