4. By taking the train, Alain can travel from Paris to Lille in
one hour. The same trip takes 5 hours by bus. The train
costs €80 and the bus €20 When Alain is not traveling he
can work and earn €25 per hour.
4000
a. What is the opportunity cost of Alain for traveling by
bus and by train?
b. What will be the answer if another person chooses not
to travel and, instead, to work for €10 per hour?
bus: 20 + 25x 5 = 145
train: 80+ 25 = 105