Answer:
16 in.
Step-by-step explanation:
Use the formula
P = 2(l+w)
We are solving for w so the formula changes a little bit
w = [tex]\frac{P}{2}[/tex] - l = [tex]\frac{56}{2}[/tex] - 12 = 16in.
So basically the answer is 16 inches.
Hope this helps you! Have an amazing day :)
