An athlete completes one round of a circular track of radius \( R \) in \( 40 \mathrm{sec} \). W...

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An athlete completes one round of a circular track of radius \( R \) in \( 40 \mathrm{sec} \). What will be his displacement at the end of \( 2 \mathrm{~min} .20 \mathrm{sec} \)
[NCERT 1990; Kerala PMT 2004]
(a) Zero
(b) \( 2 R \)
(c) \( 2 \pi R \)
(d) \( 7 \pi \mathrm{R} \)
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