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.
Square miles to acres area units conversion factor is 640. To find out how many acres in square miles, multiply by the factor or instead, use the converter below. 1 Square Mile = 640 Acres. Square mile and acre are imperial and U.S. customary area units and commonly used for land measurements. In many countries, acre (43560 sq feet) is mostly replaced by hectare (10,000 sq meters) which is a metric area unit.