Question

a man runs around exact half the circumference of a circular Park of diameter 40m what is the displacement of the man?

Answer 1

half circumference of the park=πr
=3.14×40m
=125.6m
displacement=diameter of the circle

Answer 2

Half the circumference means that he will reach the other end which seems to be just opp. to his initial point and as displacement is the shortest distance covered therefore it will be equal to the diameter of the park. so the answer is 40m.