If the ratio of the areas of two circles is 100 : 1, then the ratio of their radii is

4 :1

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1 : 8

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10 : 1

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1 : 10

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Solution

The correct option is C 10 : 1
The ratio of the areas of the two circles is square of the ratio of their radii
$\frac{100}{1} = \frac{10^{2}}{1^{2}}$
Hence ,the ratio of their radii is 10:1

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