English, asked by rajnikam349, 10 months ago

The radius of a sphere is r. find the ratio of its surface area to the area of a circle of the same radius

Answers

Answered by gorakhsasane

9

Answer:

area of circle = pie ×radius square

= 22/7×r ^

surface area of sphere= 4 pie ×radius square

= 4×22/7×r^

ratio = 1/4

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