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How do I work out the area or length of a wire when I only know the resistance/conductance and the length/area?

Asked by Gooood (50points) January 8th, 2010

I know
Conductance=conductivity x a / l
Resistance=resistivity x length / area

But for example how would I work out the length of a wire when I only know the area, conductivity and conductance?

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