The circumference of a circular field is 528 cm. Then its radius is __________.

42 cm

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84 cm

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72 cm

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56 cm

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Solution

The correct option is B
84 cm

The circumference of a circle with radius r is given by
$2 π r .$

Hence,
$2 π r = 528$

$r = \frac{528}{2 π} = 84 c m$

$(π = \frac{22}{7})$

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The circumference of a circular field is 528 cm. Then its radius is __________.

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