it is exactly 4.8280 kilometers
4.8 kilometers This question is not clear. What league? Who? When?
A league is 3.0 Miles (4.8 Kilometers).
A league is the distance a person can walk in an hour - often defined as 3 miles, or as 5 kilometers.
12.6 kilometers long
One nautical league is 5.56 kilometers.
1 league = 5.55600 kilometers = 3.45234 miles
5.572 km
6300.58 kilometers.
The Thames is 346 kilometers
The Ohio River is 981 miles long(1,579 kilometers)
4 kilometers = 2.485 miles (rounded)
12 kilometers is 7.6 miles.