A race driver is testing a new engine in a race car. The technicians give him the following instructions:
Question: What is his top speed for the second lap?
The distance can be ignored. In this example, a lap distance of 40 km (25 miles) is presumed.
The conclusion is that the race driver cannot fulfill the requirements. He would need to drive at an infinite speed in the second lap to reach an average speed of 80 km/h (50 mph) over the total two laps.