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Question

High-voltage power lines are a familiar sight throughout the country. The aluminum wire used for some of these lines has a cross-sectional area of 4.9 10-4 m2. What is the resistance of ten kilometers of this wire?

Answer 1

try this equation out
R = (rho)*(length / cross.sectional area)
rho for Al = 2.82x10^-8 ohms/m