Question

The perimeter of the coloured portion is cm.

• A. 16
• B. 18
• C. 12
• D. 20

Answer 1

The correct option is A 16

Let's count the number of squares in the outer edge of the figure.


So, there are 9 squares in the boundary of the figure. Since the side of each sqaure is of 1 cm length,
For square 1, we need to take 3 sides for the perimeter.
For squares 2 and 3, we need to take only 1 side for perimeter.
For square 4, we need to take 2 sides for perimeter.
For squares 5 and 6, we need to take only 1 side for perimeter.
For square 7, we need to take 3 sides for the perimeter.
For squares 8 and 9, we need to take 2 sides for perimeter.

=> Perimeter of the figure = 3+1+1+2+1+1+3+2+2 = 16 cm