A rectangular plot has one side of 20 feet left open and needs fencing on the remaining three sides. If the total area of the plot is 680 square feet, what is the total length of fencing required?

Explanation

Let the length of the side perpendicular to the 20 feet side be x. The area is given by 20 × x = 680, so x = 34 feet. The fencing is required on three sides: two sides of length x and one side of 20 feet. Therefore, total fencing = 20 + 2 × 34 = 20 + 68 = 88 feet.