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(1)The Ob-Irtysh river is the 7th longest river in the world. From its source in Mt. Mangdaiqia, Xinjiang of China to the mouth in Ob Bay of Russia, the total length of the Ob-Irtysh 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: 10.1080/17538940902746082

(2)The combined Ob-Irtysh system is 5411km

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What is the length of the river Ob-Irtysh in km?

It is 5,410 kms long.


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The Ob River in western Siberia (Russia) has its mouth at the Gulf of Ob, near the northern end of the Ural Mountains. The gulf is the world's longest estuary, and flows to the Kara Sea, which is an arm of the Arctic Ocean.


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It can be considered one of the 10 longest by itself, and the Ob-Irtysh combination is arguably the 7th longest river system in the world, the fourth-longest in Asia.


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What is the widest point of the ob river?

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