1 square km of gravel
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Answer: 1 km² = 0.386102 mi²
Answer: 5000 km² = 1,930.510 mi²
You can convert miles to km, or square miles to square kilometers. You can't convert square units to linear units.
0.0040469 square km
The surface area of Mars is approximately 144,798,500 square kilometers. The equatorial radius is about 3,396 km and the polar radius is 3,376 km.