Answer:
319.5in
Explanation:
First lets calculate the area of all the rectangles
2(6in * 15in) = 180in
The 2 is because there are two rectangles with the dimensions of 6in and 15in.
7.5in * 15in = 112.5in
112.5in + 180in = 292.5
Next lets calculate the area of the triangles.
4.5in * 6in / 2 = 13.5in
13.5 + 13.5 = 27in
292.5in + 27in = 319.5in
hope this helps!