The escape velocity of a body on the sur...

The escape velocity of a body on the surface of earth is 11.2 km/ s. If the earth's mass increases to twice its present value and the radius of the earth becomes half, the escape velocity would become

`5.6 km *s^(-1)`

`11.2 km *s^(-1)`

`44.8 km *s^(-1)`

`22.4 km *s^(-1)`

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