Suppose Family B was the first to open their cabin this season and performed what it felt was adequate maintenance for itself.
"250Q- 5\/2 Q^2=120Q"
So, the part of Family B is Q=52.
Then Family A opens their cabin. Knowing what Family B has already done, would Family A do any further work? How much?
So, the part of Family A is Q=20.
Then Family C arrives. Knowing what Company A and B have already done, would Family C do any more work? How much?
Total work Q=100
Family C do 100-(52+20)=28.
B. Given the total amount of work done by all three families, how much net benefit will each company get?
Family A: $120·20=$2400
Family B: $120·52=$6240
Family C: $120·28=$3360