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Question 20

If the area of a circle of radius $$5$$ is numerically $$x\%$$ of its circumference, then $$x$$ is


Correct Answer: 250

Solution

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The area is $$\pi r^2 = 25\pi$$ and the circumference is $$ 2\pi r = 10\pi$$. Thus $$25\pi=\frac{x}{100}\times 10\pi$$, which gives $$x=250$$.

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