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The ratio of escape velocities of two planets if g value on the two planets are 9.9m/s²and 3.3m/s² and their radii are 6400km and 3200km respectively is

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2.36 : 1

3.36 : 1

4.36 : 1

1.36 : 1

answer is A.

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Detailed Solution

$V_{e} = \sqrt{2 gR} \Rightarrow V_{e} \propto \sqrt{gR}$

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