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प्रश्न
An athlete completes one round of a circular track of radius R in 80 sec. What will be his displacement at the end of 4 min 60 seconds?
पर्याय
2πR
3πR
`sqrt2 "R"`
Zero
MCQ
उत्तर
`sqrt2 "R"`
Explanation:
∴ Displacement is line segment AB
AB = `sqrt("R"^2 + "R"^2) = sqrt2 "R"`
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