In the following figure, three circles are given. The two smaller circles are equal. The radius of the larger circle is 8 cm. O is the centre of the larger circle. Find the area of shaded portion.
A
16π
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B
20π
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C
4π
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D
8π
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Solution
The correct option is A16π Sum of areas of two smaller circles 2×π×42=32π. Area of larger circle =π×82=64π Area of shaded portion =64π−32π2=32π2=16π