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A rocket trevelling at the speed of 500m...

A rocket trevelling at the speed of `500m/s` ejects it's product of combustion at the speed of 1500 metre/sec relative to the rocket. Then the speed of escaping vapours with respect of the person on the ground is

A

`500 m/s`

B

`1000 m/s`

C

`1500 m/s`

D

`2000 m/s`

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The correct Answer is:
B
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