The length of the border between the United States and Mexico is approximately 1,954 miles.
Around 900 miles
1538 miles long
The shortest land border between continents is the border between Africa and Asia, which is mainly marked by the Suez Canal in Egypt, with a length of around 120 meters (394 feet). Another short land border between continents is the border between Europe and Asia, which is defined by the Ural River and the Ural Mountains in Russia, with a length of about 300 kilometers (186 miles).
1610 Km according to my knowledge.
From Rila mountain crossing the full length of Bulgaria to be poured in BLACK SEA. Longest river in Bulgaria
length of Iran and Pakistan border is 805km.
Kazakhstan and Russia share the second longest border at 6,846 km
The Rio Grande serves as a natural border between the United States and Mexico for part of its length, and a political border for the rest. Many sections are defined by treaties and agreements between the two countries.
The longest west-east border of South Australia is along its coastline. This part of the border, along the south, is 3816 km in length.
Kilometres are the appropriate unit.
The border is defined along the course of the Hondo River. The Belize-Mexico Border has a length of 251 Kilometers (132 miles), delimiting the border between Mexican states of Quintana Roo and Campeche on the Yucatan Peninsula, and the country of Belize.