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The solid rubber balls A and B having m...

The solid rubber balls A and B having masses 200 and 400 gm respectively are moving in opposite directions with velocity of A equal to 0.3 m / s . After collision the two balls come to rest, then the velocity of B is

A

`0.15 ms^(-1)`

B

` - 0.15 ms^(-1)`

C

`1.5 ms^(-1)`

D

none of these

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The correct Answer is:
B
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