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Question

The longest chord of a circle is 20 cm. Find the circumference of the circle.
(Take π = 3.14)

A
65.5 cm
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B
70.6 cm
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C
67.2 cm
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D
62.8 cm
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Solution

The correct option is D 62.8 cm
Longest chord of a circle is its diamter(d).

Here d = 20 cm.
Circumference of the circle =πd
=3.14×20=62.8 cm

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