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If the radius of a circle is increased by 6%, find the percentage increase in its area.

15%
12.36%
8.39%
17%

Correct Answer: 12.36%

Explanation:

Given that, a = 6
According to the formula,
Percentage increase in area
= 2a + [a²/100]%
= 2 x 6 + [36/100]%
= (12 + 0.36)%
= 12.36%

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