[" The external diameter of a "5" meter ...

[" The external diameter of a "5" meter long hollow tube is "10cm" and thickness of its wall is "5mm],[" .The specific resistance of copper are "1.7times10^(-8)ohm-m" then its resistance is "],[[" a."4.2times10^(-5)Omega," b."3.5times10^(-5)f," c."6.1times10^(-5)Q," d."5.7times10^(-5)O]]

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[" The external diameter of a "5" meter long hollow tube is "10cm" and thickness of its wall is "5mm],[" .The specific resistance of copper are "1.7times10^(-8)ohm-m" then its resistance is "],[[" a."4.2times10^(-5)Omega," b."3.5times10^(-5)f," c."6.1times10^(-5)Q," d."5.7times10^(-5)O]]

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