The area of a rectangular plot is calculated by multiplying its length by its width. In this case, the plot is 4 km long and 8 km wide. To find the area:
1. Area = Length x Width
2. Area = 4 km x 8 km
3. Area = 32 km²
Therefore, the correct answer is B. 32 km². This means the area of the rectangular plot is 32 square kilometers.
