Question

The radius of the Earth is apprximately 3,960 miles, while the radius of the Moon is approximately 1,080 miles. How many times larger is the surface area of the Earth than the surface area of the Moon?

Answer 1

The area of a sphere can be obtained by A = 4*pi*r^2

Let us compare the surface areas of the Earth and the Moon:

Surface area of the Earth:

A = 4*pi*(3960)^2
A = 197060797.4 mi^2

Surface area of the Moon:

A = 4*pi*(1080)^2
A = 14657414.68 mi^2

Comparing the two:

197060797.4/14657414.68 = 13.44

Therefore, the surface area of the Earth is 13.44 times much larger than the surface area of the Moon.