If Lily and Rael work together on a project, they will complete it in 10 days. If Rael were to work with Owen on the same project, they will take a day longer. If Owen and Bryan work together, they will take 120% more time than Lily and Rael. If Lily and Bryan were to work together, how many more days will they take to complete the project compared to Rael and Owen working together?
Time taken by Lily and Rael in percent = 100%
Time taken by Owen and Bryan = 100% + 120% = 220%

Time taken by Lily and Rael = 10 days ---- (1)
Time taken by Rael and Owen = 11 days ---- (2)
Time taken by Owen and Bryan = 220% x 10 = 22 days ---- (3)

(1) + (2) + (3)
Lily + Rael + Rael + Owen + Owen + Bryan → 10 + 11 + 22 = 43 days
Lily + 2 (Rael + Owen) + Bryan → 43 days
Lily + Bryan + 2 x 11 → 43 days
Lily + Bryan → 43 - 22 = 21 days

More days to complete the project for Lily and Bryan compared to Rael and Owen
= 21 - 11
= 10

Answer(s): 10