Question

Given a sphere with radius r, the formula 4rr gives

O
A. the volume
• B. the surface area
•
C. the radius
D. the cross-sectional area

Answer 1

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`\blue\textsf{\textbf{\underline{\underline{Question:-}}}}`

What does the formula 4πr² give?

`\blue\textsf{\textbf{\underline{\underline{Answer and how to Solve:-}}}}`

Formula for Volume of a Sphere:-

`\bold{V=\displaystyle(4)/(3) \pi r^3}`

So the answer is not Option A.

Formula for Surface Area of a Sphere:-

`\bold{A=4\pi r^2}`

This looks exactly like the formula we need.

So the right answer is

`\boxed{\boxed{\underline{\bold{Option\:B}}}}`

Good luck.

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Answer 2

b) The surface area

Explanation:

Surface area of sphere formula,

→ 4πr²

Thus, option (b) is the answer.