Find the circumference of the circle with the following radius: (Take $π = \frac{22}{7}$ )
$28 m m$

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Solution

Let radius be = $r$
Circumference of a circle $= 2 π r$

$\Rightarrow$ $2 π r = 28 m m$

$\Rightarrow$ $r = \frac{14}{π}$ mm

$\Rightarrow$ $r = 4.46 m m$

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Question 1 (b)

Find the circumference of the circle with the following radius: $(T a k e π = \frac{22}{7})$
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Find the circumference of the circles with the following radius: (Takeπ)

(a) 14 cm (b) 28 mm (c) 21 cm

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π = \frac{22}{7}

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π = \frac{22}{7}

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