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30 A boy runs on a circular track of radius R in km 27 C...

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30 A boy runs on a circular track of radius R in km 27 C TR 2 and then R km h in anticlockwise sense for 1 h The magnitude of his displacement will be nish with speed of om s bra km h in clockwise sense for 3 h TR 2 nivit encloones as moit er yd 3rR mod arth to 3 1 R 2 2 begooib ai dmod A 25 Mainosher 4 2R 8

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