Answer: 135 m
Step-by-step explanation: In order to find the area, you should split the shapes in 2. The 2 shapes are a trapezoid and a rectangle. To find the area of the rectangle, you need to multiply the length and width, which is 18 * 5, which is 90. For the trapezoid, you need to add the top and bottom part of the trapezoid, which is 12 + 18, then multiply it by the height divided by 2. The height is 3 because the total height is 8 and some of the height is 5, so the remaining height is 3, which is the trapezoid's height. Then, divide 3 by 2, which is 1.5. Then multiply 1.5(12+18), which is 45. Add the area of both shapes together, 45 + 90, and it is 135.
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