Question

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

Answer 1

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.