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An athlete completes a one round of a circular track of diameter 200m in 40s what will be the distance covered and the displacement at the end of 2 min and 20 sec |
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Answer» Explanation:Given :-Diameter of CIRCULAR track = 200 mRadius, r = 200/2 = 100 mTime taken by athlete to COMPLETE one ROUND = 40 seconds.To Find :-Distance COVERED = ??Displacement = ??FORMULA to be used :-Speed = Distance/TimeCircumference of circle = 2πrSolution :-2 min 20 seconds = 140 secondsNumber of rounds = 140/4 = 35⇒ Distance covered = 35 × circumference⇒ Distance covered = 35 × 2 × 22/7 × 100⇒ Distance covered = 5 × 2 × 22 × 100⇒ Distance covered = 22000 mHence, the distance covered at the end of 2 min 20 seconds is 22000 m or 22 km.And displacement is 200 m as it return to initial position again. |
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