If the radius of the circle is $4.5 c m$ , find the diameter of the circle.

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Solution

Given radius of the circle, $r = 4.5 c m$
Diameter of the circle is twice the radius of the circle.
Diameter of the circle, $D = 2 r = 2 \times 4.5 c m = 9 c m$
Hence, Diameter of the circle is $9 c m$ .

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