A boy completes one round of a circular track of radius \( 20 \math...

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A boy completes one round of a circular track of radius \( 20 \mathrm{~m} \) in 50 seconds. The displacement at the
P end of 4 minute 10 second will be

W
(1) \( 40 m \)
(2) \( 20 m \)
(3) \( 80 \mathrm{~km} \)
(4) Zero
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