A rectangular field will be walled on three sides, leaving a 20-foot-long side unfenced. How many feet of fence will be required if the field measures 680 square feet?
A. 34
B. 40
C. 68
D. 88
Answer:D
A rectangular field will be walled on three sides, leaving a 20-foot-long side unfenced. How many feet of fence will be required if the field measures 680 square feet?
A. 34 B. 40 C. 68 D. 88
Explanation: We have the following measurements: l = 20 ft and lb = 680 sq. ft.As a result, b = 34 ft.Fencing length = (l + 2b) = (20 + 68) feet = 88 feet.