You will have to convert it to square miles yourself, I use metric units.
The surface area of Earth is 510 million Km2
This is broken into:
Land 149 million Km2
Water 361 million Km2
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los angeles
approximately 10,000 square miles
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The land mass of the US has an area of 9,161,922 square kilometers.
Kilograms depend on number of parts in an object and for no unit of mass, we can be squaring. It can be having several different units for masses but it only says the forces of attraction and it is inversely proportional to the square of the distances