The height at which the value of acceleration due to gravity becomes `50%` of that at the surface of the earth. (radius of the earth =`6400 km`) is

Calculate the height at which the value of acceleration due to gravity becomes 50% of that at the earth. (Radius of the earth = 6400 km)

Find the value of acceleration due to gravity in a mine at a depth of 80 km from the surface of the earth . Radius of the earth = 6400 km .

Find the value of acceleration due to gravity in a mine at a depth of 80 km from the surface of the earth . Radius of the earth = 6400 km .

Calculate the depth below the surface of the earth where acceleration due to gravity becomes half of its value at the surface of the earth . Radius of the earth = 6400 km.