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Two bodies of 6kg and 4kg masses have th...

Two bodies of `6kg` and `4kg` masses have their velocity `5hati - 2 hat j + 10 hat k` and `10hat i - 2 hat j + 5 hat k` respectively. Then, the velocity of their centre of mass is

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The velocity of centre of mass is
`V_(CM)=(m_(1)vec(v)_(1)+m_(2)vec(v)_(2))/(m_(1)+m_(2))=7hati-2hatj+8hatk`
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