Answer:
400/Pi
Step-by-step explanation:
Pi = 22/7, do 400 ÷ 22/7
62831.5 yard²
Diameter is the straight line across the ciricle so is 400 yards
the area is πr²
r = half the diameter = 200 yards
200² x π = 125663
divide by 2 = 62831.5
