Question

An athlete completes one round of a circular track of diameter 40 m in
12 sec. What will be the distance covered and the displacement at the end
of 54 sec ?​

Answer 1

Answer:

Since one lap is 125.66 m, his total displacement is approximately 125.6... The distance covered in ONE round is pi * diameter = 125.66 m. Since one lap around the track is 125.66 m, in 54 seconds he would've completed (laps from his starting point) 565.5 m / 125.66 m = 4.5 laps.