The diameter of the moon is approximately one-fourth of the diameter of the earth.
Find the ratio of their surface area.
Let the diameter of the earth be 'd'. Therefore, the diameter of moon will be d4.
Radius of the earth = d2
Radius of the moon = 12×d4=d8
The surface area of sphere = 4π r2
Surface area of the moon
Surface area of the earth
Therefore, the ratio of their surface areas will be 1:16.