Question

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Answer this Easiest question and gain points

area of a circle is 394.24 square centimetre find its diameter


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Please tell me answer of this question in easy way but Step-by-step explanation ​

Answer 1

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Answer 2

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STEP BY STEP EXPLANATION :-

$\pi r^2 = 394.24 \: cm {}^{2}$

$22/7 \times r^2 = 394.24$

$r^2 = 394.24 \div 22/7$

$r^2 = 394.24 × 7/22\: cm$

r^2=125.44

r=root 125 .44

r=11.2

d=2r=22.4 cm

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