The escape velocity from the surface of Earth is approximately 11.2 km/s. What would be the escape velocity from a planet having twice the radius and the same mean density as Earth?

​$$\sqrt{{2}}×11.2 km/s $$

​$$\sqrt{{2}}×11.2 km/s $$

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​$$\frac{{11.2}}{{sqrt{{2}}}}km/s $$

​$$\frac{{11.2}}{{sqrt{{2}}}}km/s $$

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​$$2×11.2 km/s $$

​$$2×11.2 km/s $$

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​$$\frac{{11.2}}{{2}}km/s $$

​$$\frac{{11.2}}{{2}}km/s $$

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