The diameter of a circle is 7cm,then the radius of the circle is .

7cm

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3.5cm

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14cm

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4.5cm

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Solution

The correct option is B 3.5cm
$d = 2 r r = \frac{d}{2} r = \frac{7}{2} = 3.5 c m$
Radius of the circle = 3.5cm.

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