How many acres are there in a rectangular field measuring 620 feet by 1280 feet?

To determine the number of acres in a rectangular field measuring 620 feet by 1280 feet, you need to first calculate the total area in square feet and then convert that area into acres.

Start by calculating the area in square feet:

Area = Length × Width

Area = 620 feet × 1280 feet = 793,600 square feet.

Next, convert square feet to acres. There are 43,560 square feet in one acre. To find the area in acres, you divide the total area in square feet by the number of square feet in one acre:

Area in acres = 793,600 square feet ÷ 43,560 square feet/acre.

Calculating this gives:

Area in acres = 18.24 acres.

Rounding this value provides approximately 18.2 acres, which corresponds to the correct answer. This method of calculation incorporates both the area measurement and the necessary conversion for understanding land area in more familiar units, making it a reliable approach to solving similar questions related to field sizes.