A man is trying to enclose a round pasture. He has 240 feet of fence. How big(area) of a pasture can he enclose?
Area = pi r^2
Circumference = pi d
240 = pi d
d = 240/pi r = 120 / pi
Area = pi r^2 = pi (120 /pi)^2 = 14400 / pi ft2 = 4583.66 ft 2