In the figure, the area of the shaded part is 24a - 20b
How to find the area of the shaded part
The area of the shaded part is solved using the formula
= Area of big rectangle - area of small rectangle
Area of big rectangle
= length * width
= 3a * 8
= 24a
Area of small rectangle
= length * width
= 4b * 5
= 20b
Area of the shaded part = 24a - 20b