An athlete completes one round of a circular track of radius R in 40 seconds . what will be his displacement at the end of 20 minutes 20 seconds
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the branch of mathematics dealing with the relations of the sides and angles of triangles and with the relevant functions of any angles.
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Correct option is
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2R

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He completed one round in 40 second. In 140 second, he will cover= 140/40=3. 5 round. After 3. 5 round, he would be on the opposite side of the starting point. So the displacement will be the diameter or 2R.
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