(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
It is 5,410 kms long.
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.
Length 3,650 km (2,268 mi) from the head of the Katun River; 5,410 km (3,362 mi) from the head of the Irtysh River.
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.
many like, for example, the river ob is 2,962km that's 1,841miles long.
The river ob is 200000m long and 60 miles wide
The Ob River is located in Siberia, Russia and is 2,268 miles long. It begins at the Katun River that runs out from Belukha Mountain.
Ob River is a major river in western Siberia, Russia.
The Ob River is located in western Siberia, Russia, and is one of the longest rivers in the world. It flows for about 3,500 km from the Altai Mountains to the Gulf of Ob in the Arctic Ocean. The river is important for transportation, fishing, and hydroelectric power generation.
the Seine river is 777 km long. The river seine is 776 km long.
The Mississippi River is 5969 km long.
48 Km