A cyclist starts from the centre O of a circular park of radius 1 km , reaches the adge P of the park , then cycles along the circumference , and returns to the centre along QO as shown in Fig . 4.21 . If the round trip takes 10 min , what is the (a) net displacement.
(b) average velocity , and (c ) average speed of the cyclist ?

Answer

(a) O ; (b) O ; (c ) `21.4kmh^(-1)`