The toy race track in Figure P11.4 has three lanes, and cars cannot change lanes. The centerlines of any two adjacent lanes are 100 mm apart, and the innermost lane has a radius of 1.00 m.

(a) If each car has the same average speed, compare the time intervals needed for the cars to complete 20 laps.

(b) If all three cars start beside each other and finish the race at the same instant, how do their average speeds compare?

Data from Figure P11.4