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A ball of mass 0.1 kg makes an elastic h...

A ball of mass 0.1 kg makes an elastic head on collision with a ball of unknown mass, initially at rest. If the 0.1 kg ball rebounds at one third of its original speed, the massof the other ball is

A

0.1 kg

B

0.2 kg

C

0.3 kg

D

0.4 kg

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