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15. A circle with area A1 is in the interior of a larger circle with area A1+A2. If the radius of the larger circle is 3 and A1, A2, A1+A2 are in A.P, then radius of the smaller circle is

Answer» 15. A circle with area A1 is in the interior of a larger circle with area A1+A2. If the radius of the larger circle is 3 and A1, A2, A1+A2 are in A.P, then radius of the smaller circle is


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