Multiple choice general knowledge math & puzzles

If 2 miles of fence enclose a square plot of 160 acres, how large a square will 4 miles of fence enclose?

  1. 1 square mile

  2. 2 square mile

  3. 1000 acres

  4. 960 acres

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A square with a perimeter of 2 miles has sides of 0.5 miles. Area = 0.5 * 0.5 = 0.25 sq miles (which is 160 acres). If the perimeter is doubled to 4 miles, the side becomes 1 mile. Area = 1 * 1 = 1 square mile.