The area of the given composite figure is ____________. 

The correct answer is: 72 sq. in

The formula of the area of the rectangle is ,where L is the length/base of the rectangle and B is the breadth/width of the rectangle. We will first calculate the area of one rectangle after that the other rectangle and then will add both the areas to get the final answer.
Area of Rectangle 1
Step1: Given length =   and width = . Now we have to put it in the formula of the area of the rectangle to get the area.
Area = 
Step2: Now we will calculate the area of the rectangle.
Area = 
Area = .
So, the area of the rectangle 1 is .
Step3: Now we will calculate the area of another rectangle
Area = 
Step4: Given the length =  and width =  of the rectangle. Now we will put the values of length and width in the above formula to calculate the area.
Area = 
Area = 
Step4: Now we will add the area of both the rectangles to get the final answer.
Total Area = 
Total Area = 
So, the total area of  the given figure is .