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13 March, 07:18

The ratio of the circumferences of two circles is 2:3. If the large circle has a radius of 39 cm, what is the radiusof the small circle?

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  1. 13 March, 10:49
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    C1/C2 = 2/3

    2pi r1 / 2pi r2 = r1/r2 = 2/3

    r1/39 = 2/3

    r1 = 39*2/3 = 26

    So, your answer is 26cm
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