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

Time taken by Lucas and Caleb = 10 days ---- (1)
Time taken by Caleb and Nora = 11 days ---- (2)
Time taken by Nora and John = 180% x 10 = 18 days ---- (3)

(1) + (2) + (3)
Lucas + Caleb + Caleb + Nora + Nora + John → 10 + 11 + 18 = 39 days
Lucas + 2 (Caleb + Nora) + John → 39 days
Lucas + John + 2 x 11 → 39 days
Lucas + John → 39 - 22 = 17 days

More days to complete the project for Lucas and John compared to Caleb and Nora
= 17 - 11
= 6

Answer(s): 6