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The earth is assumed to be a sphere of r...

The earth is assumed to be a sphere of raduis `R`. A plateform is arranged at a height `R` from the surface of the `fv_(e)`, where `v_(e)` is its escape velocity form the surface of the earth. The value of `f` is

A

`sqrt(2)`

B

`(1)/(sqrt(2))`

C

`(1)/(3)`

D

`(1)/(2)`

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The correct Answer is:
B
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