1 kilometre = 1000 metres. You now have all the information required to answer this and similar questions.
Most likely 15 meters, as 15 kilometers is many miles high.
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
63.5 kilometers = 63,500 meters