The area of a circle is increased by 22 cm^2 when its radius is increased by 1 cm. What is the original radius of the circle? ( A ) 6 cm ( B ) 3.5 cm ( C ) 3 cm ( D ) 2 cm
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Step-by-step explanation:
22+22/7×x2=22/7(×+1)2
22 (8/7)×2=22/7 (×+1)2
8×2=×2+1+2×
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