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The the total length of the Ob River is 5,525 km or 3,434 miles.

SOURCE: S. Liu, P. Lu, D. Liu, P. Jin, W. Wang, Pinpointing the sources and measuring the lengths of the principal rivers of the world, International Journal of Digital Earth, Volume 2, Issue 1 March 2009 , pages 80 - 87,DOI: 10.1080/17538940902746082ce

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12y ago

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