An athlete completes one round of a circular track of radius R in 40s what will be his displacement at the end of 2m 20s
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2R
Explanation:
AFTER 3 ROUNDS 120 SECONDS WILL BE OVER AND 20 SECONDS WILL BE LEFT AND AFTER 20 SECONDS HE WILL COVER HALF CIRCLE SO DISPLACEMENT IS SHORTEST DISTANCE SO OF HALF CIRCLE IS ITS DIAMETER WHICH WILL BE 2R .
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