If Ethan and Violet work together on a project, they will complete it in 10 days. If Violet were to work with Michael on the same project, they will take a day longer. If Michael and Christopher work together, they will take 180% more time than Ethan and Violet. If Ethan and Christopher were to work together, how many more days will they take to complete the project compared to Violet and Michael working together?
Time taken by Ethan and Violet in percent = 100%
Time taken by Michael and Christopher = 100% + 180% = 280%

Time taken by Ethan and Violet = 10 days ---- (1)
Time taken by Violet and Michael = 11 days ---- (2)
Time taken by Michael and Christopher = 280% x 10 = 28 days ---- (3)

(1) + (2) + (3)
Ethan + Violet + Violet + Michael + Michael + Christopher → 10 + 11 + 28 = 49 days
Ethan + 2 (Violet + Michael) + Christopher → 49 days
Ethan + Christopher + 2 x 11 → 49 days
Ethan + Christopher → 49 - 22 = 27 days

More days to complete the project for Ethan and Christopher compared to Violet and Michael
= 27 - 11
= 16

Answer(s): 16