Let x to represent the length of the original shape, then the perimeter of the original shape is:
12 + 12 + x + x
24 + 2x
Now, we can build the equation to know the perimeter of the bigger image:
Its perimeter is:
60 + 60 + 5x + 5x =
120 + 10x
Now we can divide 120 + 10x between 24 + 2x, this way:
120 + 10x/24 + 2x = 5
The correct answer is A. The image's perimeter is 5 times larger.
