The ratio of the acceleration due to gravity at the bottom of a deep mine and that on the surface of the earth is 978"/"980. Find the depth of the mine if the density of the earth is uniform throughout and the radius of the earth is 6300 km.

The ratio of the acceleration due to gravity at the bottom of a deep m

1.	The ratio of the acceleration due to gravity at the bottom of a deep mine and that on the surface of the earth is 978"/"980. Find the depth of the mine if the density of the earth is uniform throughout and the radius of the earth is 6300 km.
Answer» `12.86 KM` `13.0 km` `25.38 km` `90.9 km` ANSWER :A