An athlete completes one round of a circular track of diameter 200 m in 40 s. What will be the distance covered and the displacement at the end of 2 minutes 20 s?
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An athlete completes one round of a circular track of diameter 200 m in 40 s. What will be the distance covered and the displacement at the end of 2 minutes 20 s?
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Answer:
Distance =2198 metres
Displacement = 200 metres
Explanation:
Given :
To find :
2 minutes 20 seconds = 140 seconds
Radius of the circular track = 200/2 = 100 metres
No. Of rounds = 140/40
No.of rounds = 3.5 rounds
Distance = 3.5×Circumference of the circle
Distance = 3.5×2×3.14×100
Distance = 2198 metres
The distance covered will be 2198 metres
Displacement at end of 3.5 rounds will be equal to diameter of the circle
Diameter = Displacement = 200 metres