Answer: C. 60cm
Explanation:
To find the perimeter of the given figure, we need to divide them in easier figures.
Thus, we divide it into three rectangles as given in the figure .
If we consider whole as a rectangle , then opposite sides must be equal, thus, we get the remaining dimensions of the sides as shown in the figure.
Now, the perimeter of the figure =

Hence, the perimeter of the given figure = 60 cm