The height above surface of earth where the value of gravitational acceleration is one fourth of that at surface, will be

If the earth is assumed to be a sphere of radius R, the height above the surface of the earth where the value of the acceleration due to gravity will be half its value on the earth's surface is

The value of gravitational accelerationg at a height h above the earth's surface is 0ne forth the value of gravitational acceleration at surface ,then (R = radius of earth)

If the radius of the earth is 6400 km, the height above the surface of the earth where the value of acceleration due to gravity will be 4% of its value on the surface of the earth is

The ratio of the height above the surface of earth to the depth below, the surface of earth, for gravitational accelerations to be the same (assuming small heights) is