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Question

The circumference of a circle exceeds its diameter by 45 cm. Find the circumference of the circle.

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Solution

According to question

2πr=2r+45


2r(π1)=45


2 r 15 over 7 equals 45 r equals 21 over 2
hence the circumference of a circle =
2 22 over 7 cross times 21 over 2 equals 66 c m


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