Question

diameter of the earth is fore times approximately the diameter of the moon find the ratio of their surface area

Answer 1

Answer:

Diameter of Moon = R

Radius of Moon = R/2

Diameter of Earth = 4R

Radius of Earth = 4R/2 = 2R

Now,

Surface area of Moon = 4pi(R/2)^2 = pi×R^2

Surface area of Earth = 4pi(2R)^2 = 16×pi×R^2

Ratio of Surface area of Earth to Moon = 16×pi×R^2/pi×R^2 = 16:1