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Area of a Circle

The differenc...

Question

The difference of the circumference of two circles is 66 cm. If the diameter of bigger circle is 28 cm, then the diameter of the other circle is cm

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Solution

$D i f f e r e n c e o f c i r c u m f e r e n c e o f t w o s e m i c i r c l e s = 66 c m π (D - d) = 66 28 - d = \frac{66 \times 7}{22} = 21 d = 28 - 21 = 7 c m$

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