Question

Find the radius of the circle whose area is 308 sq cm​

Answer 1

Answer:

Area= πr²

308 =22/7 r²

r²=308 x 7/22

r²=98

r=√98

r=9.89949494

the radius of the circle =9.89949494

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Answer 2

To find : radius of circle .  

Given : area of circle = $308\ cm^{2}$  

Solution :

• Let area of circle be $r$ .
• We know that , area of circle = $\pi r^{2}$
• Now , substituting the value , we find radius .

          $308 = 3.14 \times r^{2} \\r^{2} = \frac{308}{3.14} \\ r^{2} = 98.08 \\r = 9.90\ cm$

Hence , radius of circle is $9.90 \ cm$.