Math, asked by meghabhandari7, 8 months ago

a. Show that the ratio area:circumference for any circle is r:2, where r is the radius of the circle.
b. Find the ratio volume:surface area for a sphere of radius r, giving your answer as simply as possible.​

Answers

Answered by imasg
3

Step-by-step explanation:

a.

area : circumference = π r² : 2π r

= r : 2.

b.

volume : surface area = 4/3 π r³ : 4πr²

= r : 3.

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