Which letter is the correct answer and why

asked May 13, 2022 163k views

1 vote

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1 vote

Answer:

Explanation:

Here,

[Taking 'A' = 'a']

$a \: = \: 4\pi {r}^(2)$

Then for 'r',

$= > 4\pi {r}^(2) = a$

$= > {r}^(2) = (a)/(4\pi)$

$= > r = \sqrt{(a)/(4\pi) }$

$= > r = (1)/(2)\sqrt{ (a)/(\pi) }$

Hence,

Option C is correct .

Merad answered May 17, 2022

by Merad

6.4k points

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