There are 2 different definitions for the longest river in the world: 1. Only the longest path counts -> Nile is the longest river in the world 2. All branches of the river count -> Amazonas is the longest river in the world
1. Nile river is the longest in the world from Cairo ,Egypt to mountain Kilimanjaro in Congo 2.The Mississippi is the biggest river in the world in the USA (according to my geography studies)