1000 meters/kilometer
So...
21.5 km x 1000 m/km = 21,500 m
One kilometer is equal to 1000 meters.
Therefore 21.5 * 1000 = 21500 metres.
The Thames' length is 346,010 meters.
215 square feet is about 19.97 square meters.
there are 2,500 meters in 2.5 kilometers and 5,000 meters in 5 kilometers.
4 kilometers are 4,000 meters.
6,378 kilometers=6,378,000 meters
21 kilometers=21,000 meters21 kilometers = 21,000 meters
670 meters=0.67 kilometers
7 meters=0.007 kilometers
8 kilometers = 8,000 meters
49 kilometers = 49,000 meters
9250 meters are 9.25 kilometers.
15 meters = 0.015 kilometers