40075.884288 km
The widest river in the world is the Amazon River. It is also considered the longest river in the world as well. It is 6,400 kilometers long and 40 kilometers wide.
hm kilometers in Arab world
Volga's length is 3,692 kilometers.
about 300 kilometers
1,038 kilometers = 644.98 miles (rounded)
That would be the marathon at 42.195 kilometers.
About 1500 kilometers.
441 kilometers
12.6 kilometers long
It is 321 kilometers according to Google Maps.
Do you mean the earth diameter or circumference or what!!!
Depends on how many miles per hour (or kilometers per hour if you prefer) you are going, how long you continue that speed, time waiting in traffic if there is any, and how many stops are made and how long they are