The ratio of escape velocity at earth to the escape velocity at a planet whose radius and mean density are twice as that of earth is

The ratio of escape velocity at earth to the escape velocity at a plan

1.	The ratio of escape velocity at earth to the escape velocity at a planet whose radius and mean density are twice as that of earth is
Answer» `1:2` `1:2sqrt(2)` `1:4` `1:SQRT(2)` ANSWER :B