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

Time taken by Alexander and Lucas = 5 days ---- (1)
Time taken by Lucas and Dylan = 6 days ---- (2)
Time taken by Dylan and Stella = 220% x 5 = 11 days ---- (3)

(1) + (2) + (3)
Alexander + Lucas + Lucas + Dylan + Dylan + Stella → 5 + 6 + 11 = 22 days
Alexander + 2 (Lucas + Dylan) + Stella → 22 days
Alexander + Stella + 2 x 6 → 22 days
Alexander + Stella → 22 - 12 = 10 days

More days to complete the project for Alexander and Stella compared to Lucas and Dylan
= 10 - 6
= 4

Answer(s): 4