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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

`22kms^(-1)`

B

`11kms^(-1)`

C

`5.5kms^(-1)`

D

`15.5kms^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
A
`V=sqrt((2GM)/R)=sqrt((2G4/3 pi R^(3) rho)/R)`
`V prop R`
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