Use the image to answer the question.

Question

An illustration shows the unfolded version of a rectangular prism composed of 6 rectangles. There are four adjoining rectangles positioned horizontally. The first and third are similar and bigger. The second and fourth are similar and smaller. The third rectangle is labeled 4 inches on the top horizontally. The fourth rectangle is labeled as 2.25 inches on the top and 8 inches on the right side. The first rectangle shares the top and bottom sides with two similar rectangles, one on each side.

What is the surface area of the rectangular prism?

Answer 1

To calculate the surface area of the rectangular prism, we need to find the area of each individual rectangle and then add them together.

The area of the first rectangle is:
2.25 inches x 8 inches = 18 square inches

The area of the second rectangle is:
4 inches x 8 inches = 32 square inches

The area of the third rectangle is:
4 inches x 8 inches = 32 square inches

The area of the fourth rectangle is:
2.25 inches x 8 inches = 18 square inches

Adding all four areas together:
18 + 32 + 32 + 18 = 100 square inches

Therefore, the surface area of the rectangular prism is 100 square inches.