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26 September, 13:52

A circle with radius of 4cm sits inside a circle with radius of 11cm.

What is the area of the shaded region?

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  1. 26 September, 14:04
    0
    Area of shaded region = 329.70 cm²

    Step-by-step explanation:

    Area of a circle = πr²

    Area of bigger circle = 3.14 * 11²

    = 3.14 * 11 * 11

    = 379.94 cm²

    Area of smaller circle = 3.14 * 4²

    = 3.14 * 4 * 4

    = 50.24 cm²

    Area of shaded region

    = Area of bigger circle - Area of smaller circle

    = (379.94 - 50.24) cm²

    = 329.70 cm²
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