Final answer:
To find the perimeter of a rectangle, add up all the sides and multiply by 2.
Step-by-step explanation:
The perimeter of a rectangle is found by adding up all the sides. In this case, the length of the soccer field is 15m and the width is 12m. To find the perimeter, we add the length and width together, and then multiply by 2.
Perimeter = 2 × (length + width)
Perimeter = 2 × (15 + 12)
Perimeter = 2 × 27
Perimeter = 54m
Therefore, the correct answer is 54m (option a).