To find the surface area of the rectangular prism, we need to calculate the area of each of the 6 rectangles and then add them all together.
1. Top rectangle: Area = 54 square inches
2. Bottom rectangle (same as top): Area = 54 square inches
3. First side rectangle (same as third): Area = 36 square inches
4. Second side rectangle (same as fourth): Area = 24 square inches
5. Front rectangle: Area = 36 square inches
6. Back rectangle (same as front): Area = 36 square inches
Now, add all the areas together:
54 + 54 + 36 + 24 + 36 + 36 = 240 square inches
Therefore, the surface area of the rectangular prism is 240 square inches.