Question

the diameter of moon is approximately one fourth of the diameter of the earth find the ratio of their surface areas .

Answer 1

⇒ Let the diameter of the earth be d metre.

⇒ And, the diameter of moon is d/4 metre.

⇒ V1 = Volume of earth

⇒ V2 = Volume of moon

⇒ Volume of sphere = 4/3 π (r^3)

⇒ V1 = 4/3π(d/2)^3

⇒ V1 = π/6(d)^3

⇒ V2 = 4/3π(d/8)^3

⇒ V2 = π/384(d)^3

⇒ V1/V2

⇒ 1/64

Answer 2

Answer:

well, it will help

Step-by-step explanition:-

Ratio of surface area=4πr^2/4π(4r)^2

=r^2/16r^2

=1/16

=1:16