The ratio of escape velocity at earth (V...

The ratio of escape velocity at earth `(V_(e))` to the escape velocity at a planet `(V_(p))` whose radius and mean density are twice as that of earth is

A

`1 : 2`

B

`1 : 2sqrt(2)`

C

`1 : 4`

D

`1 : sqrt(2)`

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The correct Answer is:

B

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