Final answer:
The athlete covers a distance of 2513.28 meters after making two rounds of the track. However, his displacement is zero, as he starts and finishes at the same point.
Step-by-step explanation:
To calculate the distance covered by the athlete, we first need to compute the circumference (perimeter) of the circular track. The formula for this is 2πr, where r is the radius. Given that the track's diameter is 400m, the radius is 200m. Therefore, the track's circumference is 2π x 200 = 1256.64m. As the athlete has made two rounds, the total distance covered is 2 x 1256.64m = 2513.28m.
The displacement, however, is zero after making 2 rounds. Displacement is the shortest distance from the initial to the final position (it is a vector quantity). In this case, as the athlete starts and finishes at the same point, the magnitude of the displacement is zero.
Learn more about Distance and Displacement