All you have to do is break this image into parts of two different shapes and find the areas of those two shapes. Then you can add them together and you will have your answer. Your work should look like this:
For one of the rectangles:
Length * Width
8 * 10 = 80
For the other rectangle:
Length times width
10 - 5 = 5 (You have to subtract 10 - 5 because you need to know the measurement of the of the width of the top rectangle, and the top rectangle is not a full 10 inches like the bottom one. )
15 - 8 = 7 (For the same reason as the width, you also need to subtract to find the length of the top rectangle.)
Now multiply.
Length * width
5 * 7 = 35
Now that you have the two areas of the two separate rectangles, you can add them together.
35 + 80 = 115
