If this attribute is not specified, this <input> element must be a descendant of a <form> element. This attribute enables you to place <input> elements anywhere within a document, not just as descendants of their form elements.
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.
A square mile is defined as 640 acres. A square mile is 5,280 feet x 5,280 feet, for a total of 27,878,400 square feet. Divide that by 640 to get 43,5â¦60 square feet in an acre. An acre is 43,560 square feet.