Question

Find the circumference of a circle if the area is 300 square centimeters.

a. 56.25 cmb. 9.77 cmc. 61.38 cmd. 84.74 cm

Answer 1

C 61.38cm

Explanation:

Answer 2

The answer is: [C]: 61.38 cm .
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Note: A =
`\pi *r`²

300 = (3.14) * r² ;
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Divide each side by "3.14" ;

r² = 300/3.14 ;

r² = 95.5414012738853503 ;

√r² = √(95.5414012738853503) ;

r = 9.7745281867661188048

Circumference, "C" =
`\pi` * d ; (d = diameter = 2*r);

C = 2*
`\pi`*r ;

C = 2*(3.14)*(9.7745281867661188048)

C = 61.384037012891226094144 ; which rounds to answer choice:
[C]: 61.38 cm .
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