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A body of mass 3 kg moving with a veloci...

A body of mass 3 kg moving with a velocity `(2hati+3hatj+3hatk)` m/s collides with another body of mass 4 kg moving with a velocity `(3hati+2hatj-3hatk)` m/s. The two bodies stick together after collision. The velocity of the composite body is

A

`frac(1)(7) (4hati + 6hatj - 3hatk)`

B

`frac(1)(7) (18hati + 17 hatj - 3 hatk)`

C

`frac(1)(7) (6hati + 4hatj - 6hatk)`

D

`frac(1)(7) (9hati + 8hatj - 6hatk)`

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