There are three pairs of rectangular faces on the rectangular prism. The surface area is the sum of the areas of all six faces.
The area of one face is length times width. Since there are two faces with length 15 and width 3, we have a total of 2 x 15 x 3 = 90 square millimeters
Similarly, there are two faces with length 15 and height 4, and two faces with width 3 and height 4. The total area of these faces are 2 x 15 x 4 = 120 square millimeters and 2 x 3 x 4 = 24 square millimeters respectively.
Therefore, the total surface area of the rectangular prism is 90 + 120 + 24 = 234 square millimeters.
Note: Enter your answer and show all the steps that you use to solve this problem in the space provided.
A right rectangular prism has a length of 15 millimeters, a width of 3 millimeters, and a height of 4 millimeters.
What is the surface area of the rectangular prism?
1 answer
52 answers