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10 किग्रा तथा 2 किग्रा द्रव्यमान के दो प...

10 किग्रा तथा 2 किग्रा द्रव्यमान के दो पिण्ड क्रमश: `2hati - 7 hatj + 3hatk` तथा `-10hati + 35 hatj - 3hatk` मीटर / सेकण्ड के वेग से गतिमान है | इनके द्रव्यमान केन्द्र का वेग ज्ञात कीजिये |

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