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KEAM 2023 Physics and Chemistry Solved Paper

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Question : 64 of 120
 
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A metallic cylindrical wire ' A′ has length 10‌cm and radius 3‌mm. Another hollow cylindrical wire ' B ' of the same metal has length 10‌cm, inner radius 3‌mm and outer radius 4‌mm. The ratio of the resistance of the wires A to B is :
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