question_answer

The ratio of escape velocity at earth \[({{v}_{e}})\] to the escape velocity at a planet \[({{v}_{p}})\] whose radius and mean density are twice as that of earth is [NEET - 2016]

A) 1 : 2     

B) \[1:2\sqrt{2}\]

C) 1 : 4     

D) \[1:\sqrt{2}\]

Correct Answer: B

Solution :

[b]