The diameter of a circle is $28 c m$ . Find its circumference.

88 c m

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81 c m

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78 c m

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68 c m

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Solution

The correct option is D $88 c m$
Diameter of a circle $= 28$ cm
Thus, circumference $= π \times d = π \times 28$ cm
$= \frac{22}{7} \times 28$ cm
$= 22 \times 4$ cm
$= 88$ cm

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Calculate the circumference of a circle having its diameter as 28 cm.

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