If Nora and Harris work together on a project, they will complete it in 10 days. If Harris were to work with Aria on the same project, they will take a day longer. If Aria and Gabriel work together, they will take 90% more time than Nora and Harris. If Nora and Gabriel were to work together, how many more days will they take to complete the project compared to Harris and Aria working together?
Time taken by Nora and Harris in percent = 100%
Time taken by Aria and Gabriel = 100% + 90% = 190%

Time taken by Nora and Harris = 10 days ---- (1)
Time taken by Harris and Aria = 11 days ---- (2)
Time taken by Aria and Gabriel = 190% x 10 = 19 days ---- (3)

(1) + (2) + (3)
Nora + Harris + Harris + Aria + Aria + Gabriel → 10 + 11 + 19 = 40 days
Nora + 2 (Harris + Aria) + Gabriel → 40 days
Nora + Gabriel + 2 x 11 → 40 days
Nora + Gabriel → 40 - 22 = 18 days

More days to complete the project for Nora and Gabriel compared to Harris and Aria
= 18 - 11
= 7

Answer(s): 7