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An athlete completes one round of a circular track of radius R in 40 sec. What will be his displacement at the end of 2 min 20 seconds?

\[\begin {array} {1 1} (1)\;7R & \quad (2)\;2R \\ (3)\;2 \pi R & \quad (4)\;7 \pi R \end {array}\]
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(2) 2 R
answered Nov 7, 2013 by pady_1

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