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The velocities of three particles of mas...

The velocities of three particles of masses 20g, 30g and 50g are 101, 10j and 10k respectively. The velocity of the centre of mass of the three particles is

A

`2 veci+3 vecj+5 veck`

B

`10 (veci+vecj+veck)`

C

`20 veci+30 vecj+5veck`

D

`20veci+30 vecj+50 veck`

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A
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