30 kilometers is 18.64 miles.
75 kilometers is 46.6 miles.
About 18.6 miles.
4 kilometers is 2.49 miles.
It is 1.24 miles.
About 12,000 miles ( 20,000 k's).
6.2 Km is about 3.855 miles
75 kilometers is 46.6 miles.
assuming 60 k is meant to be 60 km 37.28 miles
The ionosphere starts at an altitude of about 48 kilometers (30 miles) above the Earth's surface and extends upwards to about 965 kilometers (600 miles).
About 30 miles
30 miles
About 30 miles