Afghanistan shares the longest border with Pakistan at 2,600 Kms.
Brazil shares its longest border with Bolivia.
Luxembourg
The country that shares the longest border with Pakistan is Afghanistan, spanning approximately 2,430 kilometers (1,510 miles).
Pakistan shares the longest border with Afghanistan. It stretches on for over 1500km.
Bangladesh
CanadaCanada shares the longest border with the US.
Alaska
Sweden shares its longest border with Norway, which is located to the West of the country. This border is 2542 miles long. Its Eastern border is shared with Finland and is much shorter, about 1/3 that length.
India shares the longest border with Bangladesh with 4096 Kilometers
Alaska, as it shares a border with Canada that extends for about 1,538 miles.
Afghanistan.