The radius of Earth is about 6378 km, and the radius of Mercury is

about 2440 km. About how many times greater is the volume of Earth

than that of Mercury

In this case, Earth and Mercury are both spheres. The formula for volume of sphere is 4/3 (pi) (radius) (radius) (radius).

Since the volume of both is immense, it is hard to describe here.

The concept to solve this problem would be to insert the appropriate radius length hence find the difference between the two spheres.