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Two congruent circles of radius 5 cm and a thirdcircle touch each other externally. All the threecircles touch a circle of radius 10 cm internally.The radius of the third circle is

Answer» Two congruent circles of radius 5 cm and a thirdcircle touch each other externally. All the threecircles touch a circle of radius 10 cm internally.The radius of the third circle is


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