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10 June, 20:40

If one Circle has a diameter of 10 cm and a second Circle has a diameter of 20 cm what is the ratio of the area of the larger circle to the area of the smaller Circle

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  1. 10 June, 20:46
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    Area of a circle is πr^2.

    The radius of the smaller circle with diameter 10 cm is 5 cm.

    The radius of the larger circle with diameter 20 cm. is 10 cm.

    Area of larger circle : Area of smaller circle

    Area of larger circle = 100π.

    Area of smaller circle = 25π.

    Ratio = 100π : 25π or 100π/25π.
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