1.

A cyclist moves from a certain point P and goes round a circle of radius a and reaches Q, exactly at the other side of the point P as shown in figure. The displacement of the cyclist would be                    

A. \[\pi a\]                        
B. \[2\pi a\]               
C.                    2a                
D.        \[2\pi /a\]                     
Answer» D.        \[2\pi /a\]                     


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