If Mason and Sebastian work together on a project, they will complete it in 10 days. If Sebastian were to work with Lucas on the same project, they will take a day longer. If Lucas and Lily work together, they will take 80% more time than Mason and Sebastian. If Mason and Lily were to work together, how many more days will they take to complete the project compared to Sebastian and Lucas working together?
Time taken by Mason and Sebastian in percent = 100%
Time taken by Lucas and Lily = 100% + 80% = 180%

Time taken by Mason and Sebastian = 10 days ---- (1)
Time taken by Sebastian and Lucas = 11 days ---- (2)
Time taken by Lucas and Lily = 180% x 10 = 18 days ---- (3)

(1) + (2) + (3)
Mason + Sebastian + Sebastian + Lucas + Lucas + Lily → 10 + 11 + 18 = 39 days
Mason + 2 (Sebastian + Lucas) + Lily → 39 days
Mason + Lily + 2 x 11 → 39 days
Mason + Lily → 39 - 22 = 17 days

More days to complete the project for Mason and Lily compared to Sebastian and Lucas
= 17 - 11
= 6

Answer(s): 6