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[" 6.Let the moment of inertia of a holl...

[" 6.Let the moment of inertia of a hollow cylinder of "],[" length "30cm" (inner radius "10cm" and outer radius "],[20cm" ),about its axis be I.The radius of a thin "],[" cylinder of the same mass such that its moment of "],[" inertia about its axis is also I,is: "],[[" (A) "12cm," (B) "18cm" (C) "16cm," (D) "14cm]]

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