The escape velocity on the surface of th...

The escape velocity on the surface of the earth is 11.2 `kms^(-1)`. If mass and radius of a planet is 4 and 2 tims respectively than that of the earth, what is the escape velocity from the planet?

11.2`kms^(-1)`

`1.112kms^(-1)`

`15.8kms^(-1)`

`22.4kms^(-1)`

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