What is the size of a rectangular field measuring 620 ft by 1280 ft in acres?

To find the size of a rectangular field in acres, you'll first calculate the area in square feet and then convert that area into acres.

The area of the rectangular field is calculated by multiplying its length by its width. In this case, the dimensions provided are 620 feet and 1280 feet:

Area = Length × Width = 620 ft × 1280 ft = 793,600 square feet.

Now, to convert square feet into acres, you can use the conversion rate that 1 acre is equal to 43,560 square feet:

Area in acres = Area in square feet ÷ 43,560 square feet per acre.

So, the area in acres for this field is:

Area in acres = 793,600 sq ft ÷ 43,560 sq ft/acre ≈ 18.2 acres.

Thus, the calculation leads us to conclude that the size of the rectangular field is approximately 18.2 acres, which aligns with the correct answer.