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

Time taken by Nora and Lilian = 5 days ---- (1)
Time taken by Lilian and Gabriel = 6 days ---- (2)
Time taken by Gabriel and Salik = 220% x 5 = 11 days ---- (3)

(1) + (2) + (3)
Nora + Lilian + Lilian + Gabriel + Gabriel + Salik → 5 + 6 + 11 = 22 days
Nora + 2 (Lilian + Gabriel) + Salik → 22 days
Nora + Salik + 2 x 6 → 22 days
Nora + Salik → 22 - 12 = 10 days

More days to complete the project for Nora and Salik compared to Lilian and Gabriel
= 10 - 6
= 4

Answer(s): 4