We can find the circumference of the pizza by multiplying the length of the outer edge of the crust by 8, then we get:
Circumference = 8×5.5 = 44
The circumference is also given by the following formula:
Circumference = π×d
Where d is the diameter of the circle.
From this formula, we can solve for d, to get:
d = Circumference/π
By replacing 44 for circumference, we get:
d = 44/π = 14
Then, the diameter of the pizza equals 14 inches, option B is the correct answer.