If Sofia and Sebastian work together on a project, they will complete it in 10 days. If Sebastian were to work with John on the same project, they will take a day longer. If John and Jacob work together, they will take 110% more time than Sofia and Sebastian. If Sofia and Jacob were to work together, how many more days will they take to complete the project compared to Sebastian and John working together?
Time taken by Sofia and Sebastian in percent = 100%
Time taken by John and Jacob = 100% + 110% = 210%

Time taken by Sofia and Sebastian = 10 days ---- (1)
Time taken by Sebastian and John = 11 days ---- (2)
Time taken by John and Jacob = 210% x 10 = 21 days ---- (3)

(1) + (2) + (3)
Sofia + Sebastian + Sebastian + John + John + Jacob → 10 + 11 + 21 = 42 days
Sofia + 2 (Sebastian + John) + Jacob → 42 days
Sofia + Jacob + 2 x 11 → 42 days
Sofia + Jacob → 42 - 22 = 20 days

More days to complete the project for Sofia and Jacob compared to Sebastian and John
= 20 - 11
= 9

Answer(s): 9