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Question

Match the following circle with the given radius with their circumference.

A
110 cm
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B
22 cm
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C
66 cm
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D
44 cm
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Solution

Circumference of a circle =2 π r

For radius = 7 cm
Circumference=2 ×227×7=44 cm

For radius = 3.5 cm Circumference=2 ×227×3.5=22 cm

For radius = 10.5 cm
Circumference=2 ×227×10.5=66 cm

For radius = 17.5 cm
Circumference=2 ×227×17.5=110 cm

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