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A bullet leaves the rifle of mass one kg...

A bullet leaves the rifle of mass one kg and rifle recoils thereby with velocity 30 cm/s. If the mass of the bullet is 3 g, the velocity of the bullet is

A

`10^4 cm//s`

B

`3 xx 10^2 cm//s`

C

`10^2 cm//s`

D

`10 cm//s`

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