Find the original radius of a circle given that when the area of the circle is increased by 44 cm, its radius increases by 2 cm.

6 cm

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2.5 cm

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5 cm

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4 cm

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7.5 cm

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Solution

The correct option is B
2.5 cm

$π [{(r + 2)}^{2} - r^{2}] = 44 (g i v e n) \Rightarrow r = 2.5$

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