Two bodies of masses 10 kg and 2 kg are ...

Two bodies of masses 10 kg and 2 kg are moving with velocities `2 hati - 7 hatj + 3hatk m s^(-1) and -10 hati + 35hatj - 3 hatk m s^(-1)` respectively. The velocity of their centre of mass is

`2hati`m/s

`2hatk`m/s

(`2hatj+2hatk`)m/s

(`2hati+2hatj+2hatk`)m/s

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