Question

what is the ratio of spherehemisphere

Answer 1

the ratio is 4:3

Let the radius of the sphere and hemisphere be r cm.

We know,

The total area of a sphere = 4πr2

And, the total area of a hemisphere = 2πr2 + πr2 = 3πr2

∴ The ratio of their total surface area = 4πr2 : 3πr2 = 4 : 3.

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