Question

Marc run from one end to other end of a semi-circle track whose radius is 140m. What is the distance covered by the marc and what is his displacement?​

Answer 1

Radius = 140 m

Diameter = 280 m

Distance = $\sf{{\dfrac{1}{2}} \times 2 \pi r} = 440~ m$

Displacement = shortest distance between the starting and the end point , i.e. the diameter 280 m .