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The resistance of the wire used for telephone is 35 per kilometer when the weight of the wire is 5 kg per kilometer. If

The resistance of the wire used for telephone is 35 per kilometer when the weight of the wire is 5 kg per kilometer. If the specific resistance of the material is 1.95 x 10-8 2-m, what is the cross-sectional area of the wire? What will be the resistance of a loop to a subscriber 8 km from the exchange if wire of the same material but weighing 20 kg per kilometer is used?

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