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posledela
3 years ago
12

By 1860, the number of miles of railroad tracks throughout the United States had risen to 3,000. 30,000. 300,000. 3 million.

History
2 answers:
katrin [286]3 years ago
5 0
I would say 30,000 cause all the next developments were from the 1860's forward and that is when huge growth happened, after 1860.
IrinaVladis [17]3 years ago
3 0

the correct answer is 300,000

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