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Most telephone cables are made of copper wire of either 24 or 26 guage.

Most telephone cables are made of copper wire of either 24 or 26 guage.  If the resistance of 24 gauge wire is 137 ohms/mile and the resistance of 26 gauge wire is 220 ohms/mile, what is the ratio of the diameter of 24 gauge wire to that of 26 gauge wire?

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