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The escape velocity from the earth is ab...

The escape velocity from the earth is about 11 km/s. The escape velocity from a planet having twice the radius and the twice mean density as the earth, is

A

`31.11 kms^(-1)`

B

`11 km s^(-1)`

C

`5.5 km s^(-1)`

D

`15.5 km s^(-1)`

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The correct Answer is:
A
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