Question

An old man goes for a walk on a semi circular track of radius 40m;if he starts from one end of the track and reaches to the other end, the distance covered by the man and his displacement will respectively be

1)126m, 80m
2)80m, 126m
3)80m, 252m
4)252m, 80m

If u know then only answer it otherwise leave it

Answer 1

Distance =pai*radius =3.14*40=126
Displacement =2*r= 80

Answer 2

a) 126m, 80m

displacement= shortest distance= (40+40)m= 80m

distance= circumference of the semi-circle= $\pi$r = 126m