11. Usually there are lots of runners. The line of people stretches back hundreds of meters. As the winners are awarded prize money it is important to avoid cheating. In order to track all the participants, special chips are used. When the participants register for the marathon, they get their identification number and computer chips. The chips are activated at the start of the race and keep time.

Summary of Section 11:

Marathons typically have numerous participants, with the starting line extending for hundreds of meters. To ensure fairness and prevent cheating, especially when prize money is involved, special chips are employed. Participants receive these chips along with their identification numbers upon registration. These chips are activated at the race's commencement to accurately track each runner's time.