Identify the three dimensions of the rectangular prism: length, width, and height
Find the area of each pair of opposite faces:
Length × width
Length × height
Width × height
Add the areas of all six faces:
2(length × width) + 2(length × height) + 2(width × height)
Use the formula: Surface Area = 2lw + 2lh + 2wh
Substitute the given measurements into the formula
Calculate the result in square units