1. Identify the length \( l \) and width \( w \) of the rectangle:
l = 4
w = 8
2. Substitute the values into the perimeter formula:
P = 2(l + w)
3. Calculate the sum of the length and width:
l + w = 4 + 8 = 12
4. Multiply the sum by 2 to find the perimeter:
P = 2 \times 12 = 24
Answer: 24