An athlete complete one round of a circular track of radius R is 40 seconds what will be his displacement at the end of 2 minute 20 second
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Therefore, in 140 seconds, the athlete will cover the distance of 140/40=3.5 times 2*π*R=7πR. Since, in 140 seconds the athlete will be on the opposite side of the circle, his displacement would be 2R. This can be understood as in 120 seconds , the athlete will be at the starting point.
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2R is his displacement
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