The area of the given figure (all dimensions in units) will be
36 sq. units
On dividing the figure into squares and rectangle, it will look like:
The are of figure is sum of areas of square 1 and rectangles 2 and 3.
=(1 x 1) + ( 4 x 5 ) + (3 x 5 )
= 1 + 20 + 15
= 36 sq. units