which river is the longest river in the world ?
River Severn | River Thames. The River Nile is the longest river in the world. It measures 6,695 kilometres from its source in Burundi, along the White Nile, to its delta on the Mediterranean Sea. Officially, the shortesr river is the D River, Oregan, USA, which is just 37 metres long. The biggest river in the world, measured by the amount of water that flows down it, is the Amazon. On average 120,000 cubic metres (about 20 swimming pools' worth) of water flows out of its mouth every second. The longest river of Europe is the River Volga.