Question

find the ratio of total surface area of a sphere and a hemisphere of same radius​

Answer 1

Answer:

4:3

Step-by-step explanation:

TSA OF SPHERE:TSA OF HEMISPHERE

$\frac{4\pi {r}^{2} }{3\pi {r}^{2} } = \frac{4}{3}$

4:3 is the correct answer

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Answer 2

Answer:

Step-by-step explanation:

T. S. A of a sphere = 4πr²

T. S. A of hemisphere = 3πr²

Therfore,

Ratio of them if they are having same radius will be

= 4πr²/3π²

= 4/3

= 4 : 3

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