Question

please solve it please please ​

Answer 1

Step-by-step explanation:

let the diameter of earth is 2r

radius of the earth is. 2r/2

= r/2

diameter of the moon is 1/4×2

= r/2

radius of the moon is r/2×r/2

=r/4

surface area of spherical earth = 4πr²

4×π×r×r

4πr²

surface area of spherical moon = 4πr²

= 4×π× r/4 × r/4

= 4π r²/16

ratio of their surface areas = 4πr²

4πr²

16

= 1 / 16

= 1 : 16

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