1418 km long
Onilahy's population is 5,000.
The longest river there is Mangoky. Its length is 350 miles. Onilahy is on the second place, and Betsiboka is on the third.
A river can be as long as a country! For example the Mississippi River is almost as long as the U.S vertically.
The river Alt is 28kilometers long.
The Charles River is about 81mi long.
The Missouri River is 2,341 miles long and is the longest tributary to the Mississippi River.
The River Wharfe is a river in Yorkshire, England and is 60 miles long.
the river nile it is 6695 km long
River crouch is 17.5 miles long
The Benue River Is 1400 Km Long
The Roe River is 12.6 meters long!
The Ebro river is 298 km long.