question_answer

A particle covers \[\frac{1}{4}\]th of a circle of radius \[r\]. Then the distance travelled is ....and the displacement is .....

A)  \[\pi \,r,r\]                        

B)  \[\frac{\pi r}{2},r\]

C)  \[\frac{\pi r}{2},\sqrt{2}r\]                         

D)  \[\sqrt{2}r,\frac{\pi r}{2}\]