Answer:

Explanation:
The square is 1 unit long and 1 unit wide
There are 3 smaller rectangles in the horizontal direction
Length of each rectangle is therefore 1/3 unit
There are 6 rectangles along the vertical direction
The height of each rectangle is therefore 1/6 unit
The shaded area is 2 rectangles wide and 3 rectangles in height
Width of shaded area = 2 x 1/3 = 2/3
Height of shaded region = 3 x 1/6 = 1/2
Area of shaded rectangle is
