Bob, Peter and Paul travel together. Peter and Paul are goodhikers; each walks p miles per hour. Bob has a bad foot and drivesa small car in which two people can ride, but not three; the carcovers c miles per hour. The threee friends adopted the followingscheme: They start together, Paul rides in the car with Bob, Peterwalks. After a while, Bob drops Paul who walks on; Bob returns topick up Peter, and then Bob and Peter ride in the car till theyovertake paul. At this point, they change: Paul rides and Peterwalks just as they started and the whole procedure is repeated asoften as necessary.
A. How much progress (how many miles) does the company make perhour?
