Final answer:
To find the depth of the tract, convert the area from acres to square feet and use the formula for the area of a rectangle. The depth of the tract is 1320 feet.
Step-by-step explanation:
To find the depth of the tract, we need to convert the area from acres to square feet. Since 1 acre is equal to 43,560 square feet, we can multiply the number of acres (20) by 43,560 to get the total square footage. So, the tract contains 20 x 43,560 = 871,200 square feet.
Since the tract measures 660 feet along the highway, we can use the formula for the area of a rectangle to find the depth. Area = length x width. Rearranging the formula, we get depth = area / width. Substituting the values, we get depth = 871,200 / 660 = 1320 feet.
Therefore, the depth of the tract is 1320 feet.