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If the radius of a circle is increased by 6%, then the area of the circle is increased by ---

If the radius of a circle is increased by 6%, then the area of the circle is increased by --- Correct Answer 12.36%

Area of circle increased by = r + r + r×r100 = radius = 6 + 6 + 6×6100 = 12 + 0·63 = 12·36

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