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A circular area of 5 miles radius covers 50265.5 acres (to 1 dp) Area = pi*radius2, which with radius in miles will give you area as 78.53982 square miles, then multiply by 64 â¦ 0, since there are 640 acres in 1 square mile.
Confidence votes 5. With 268,820 square miles of area and 640 acres per square mile the actual acerage is 172,044,800 acres. You probably notice that the question asks about land and not land and water.Texas does have a little land (about 2.5 percent) that is covered by water.ith 268,820 square miles of area and 640 acres per square mile the actual acerage is 172,044,800 acres.