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A particle is thrown with escape velocit...

A particle is thrown with escape velocity `v_(e)` from the surface of earth. Calculate its velocity at height 3 R :-

A

`="9.25 km s"^(-1)`

B

`="5.6 km s"^(-1)`

C

`="11.2 km s"^(-1)`

D

`="4.3 km s"^(-1)`

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