1.

An athlete completes one round of a circular track of radius R in 40 sec. What will be his displacement at the end of 3 min. 20 sec?

A. \[Zero\] 
B. \[2R\]
C. \[2\,\pi \,R\]       
D. \[7\,\pi \,R\]
Answer» B. \[2R\]


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