If g is acceleration due to gravity at the surface of the earth, then its value at a depth of 1/4 of the radius of the earth is

If g is the acceleration due to gravity on the surface of the earth , its value at a height equal to double the radius of the earth is

If g is the acceleration due to gravity on the surface of the earth , its value at a height equal to double the radius of the earth is

The value of acceleration due to gravity on the surface of earth is x . At an altitude of h from the surface of the earth, its value is y . If R is the radius of earth, then the value of h is