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A gun fires a bullet of mass 50 g with a...

A gun fires a bullet of mass 50 g with a velocity of `30 m s^(-1)`. Because of this, the gun is pushed back with a velocity of `1 m s^(-1)`. The mass of the gun is

A

5.5 kg

B

3.5 kg

C

1.5 kg

D

0.5 kg

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