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[" 45.Four particles have speed "2,3,4" ...

[" 45.Four particles have speed "2,3,4" and "5" cmis respectively.Theirms "],[[" (A) "3.5cm/s," (B) "((27)/(2))" cms "," (C) "sqrt(54)" cm/s "," (D) "((sqrt(54))/(2))]]

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