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Mensuration — MATHS STD 7 — Question

Gujarat BoardEnglish MediumSTD 7MATHSMensuration2 Marks
Question
Find the radius of a circle whose circumference is $57.2\ cm.$
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Answer

Circumference of a circle $(c) = 57.2cm$
$\therefore\text{Radius}=\frac{\text{c}}{2\pi}=\frac{57.2\times7}{2\times22}\text{cm}=\frac{2.6\times7}{2}$
$=9.1\text{cm}$

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