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Question

The circumference of a circle exceeds its diameter by $$15 cm$$ then, the circumference of the circle is


A
22.00cm
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B
22.5cm
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C
21.01cm
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D
None
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Solution

The correct option is C $$22.00 cm$$
Let the diameter of the circle be d.
Thus, circumference is $$\pi d$$
Given
    $$πd−d=15$$
$$⇒d(π−1)=15$$
$$⇒d(227−1)=15$$
$$⇒d(157)=15$$
$$⇒d=7cm$$
So, circumference $$πd=22$$cm

Mathematics

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