If Robert and Gavin work together on a project, they will complete it in 10 days. If Gavin were to work with Noah on the same project, they will take a day longer. If Noah and Jeremiah work together, they will take 120% more time than Robert and Gavin. If Robert and Jeremiah were to work together, how many more days will they take to complete the project compared to Gavin and Noah working together?
Time taken by Robert and Gavin in percent = 100%
Time taken by Noah and Jeremiah = 100% + 120% = 220%

Time taken by Robert and Gavin = 10 days ---- (1)
Time taken by Gavin and Noah = 11 days ---- (2)
Time taken by Noah and Jeremiah = 220% x 10 = 22 days ---- (3)

(1) + (2) + (3)
Robert + Gavin + Gavin + Noah + Noah + Jeremiah → 10 + 11 + 22 = 43 days
Robert + 2 (Gavin + Noah) + Jeremiah → 43 days
Robert + Jeremiah + 2 x 11 → 43 days
Robert + Jeremiah → 43 - 22 = 21 days

More days to complete the project for Robert and Jeremiah compared to Gavin and Noah
= 21 - 11
= 10

Answer(s): 10