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A 280-km-long high-voltage transmission line 2.00 cm in diameter carries a steady current of 1,100 A....

A 280-km-long high-voltage transmission line 2.00 cm in diameter carries a steady current of 1,100 A. If the conductor is copper with a free charge density of 8.50  1028 electrons per cubic meter, how many years does it take one electron to travel the full length of the cable? (Use 3.156  107 for the number of seconds in a year.)
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