The velocities of three particles of mas...

The velocities of three particles of masses 20g, 30g and 50g are `10hati,10hatj " and " 10hatk` respectively. The velocity of the centre of mass of the three particles is

`2hati+3hatj+5hatk`

`10(hati + hatj + hatk)`

`20hati +30hatj +5hatk`

`2hati +30hatj +50hatk`

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