Question

what is the ratio of total surfaces area of sphere and hemisphere

Answer 1

Hi friend,

Here is your answer,
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Total surface area of sphere = 4πr²

Total surface area of hemisphere = 3πr²

Ratio = 4πr²/3πr²

         = ⁴/₃

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Answer 2

surface area of sphere=4πr²
surface area of hemisphere=3πr²
ratio=4πr²/3πr²
=4/3
=4:3