How many square feet in a (square) mile
27,878,400 square feet.
For instance, 20 miles square (20 × 20 miles) is equal to 400 square miles; an area of 10 × 40 miles is likewise 400 square miles, but it is not 20 miles square. One square mile is equal to: 4,014,489,600square inches. 27,878,400 square feet.
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