Question

An athletes completes one round of a circular track of diameter 200m in 40s what will be the distance covered and the displacement at the end of 2min and 20s

Answer 1

speed = 200×pi/40 = 50×pi m/s
distance = speed × time = 50×pi×140 = 700pi m
700pi = 3×pi×200+100 pi = it completes 3.5 circles
displacement = 2r = d = 200 m

Answer 2

speed = 200×pi/40 = 50×pi m/s

distance = speed × time = 50×pi×140 = 700pi m

700pi = 3×pi×200+100 pi = it completes 3.5 circles

displacement = 2r = d = 200 m