One foot is 0.0003048km
42.16 kilometers.
The moon is about one-fourth the size of Earth, with a diameter of 3,474 kilometers. Pluto, on the other hand, is smaller than our moon, with a diameter of 2,377 kilometers.
103000 square kilometers
Yes, 9 kilometers is pretty big compared to how fast a human can run.
One square mile is equal to about 2.6 square kilometers.
177 square kilometers
140 kilometers is 86.99 miles.
Compared to what? We can't give you a good answer because 3 kilometers is as big as 3 kilometers. If you'd said "How big is 3 kilometers in miles or in meters or compared to the Grand Canyon?" we could give you a good answer.
5000 kilometers
Two kilometers is a distance equal to 1.24 miles.
The surface area is 750,000 square kilometers