Question

Find the area of a circle whose circumference is 132 cm.

Answer 1

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Answer 2

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$Given \: that \: \\ Circumference \: of \: circle = 132cm \\ \\As ,\: we \: know \: that : \\ \\ circumference \: = 2\pi \: r \\ 132 = 2 \times \frac{22}{7} \times r \\ \\ 132 = \frac{44}{7} \times r \\ \\ \frac{132 \times 7}{44} = r \\ \\ r = 21cm \\ \\ Now ,\: \\ Area \: of \: circle \: = \pi \: r {}^{2} \\ \\ = > \frac{22}{7} \times 21 \times 2 1 \\ \\ = > \frac{9702}{7} \\ \\ = > 1386cm {}^{2}$

So , Area of circle is 1386cm^2..
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