What is the surface area of a rectangular prism with length 8, width 3, and height 5?

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Study for the GMAS 6th Grade Mathematics Test. Prepare with flashcards and multiple choice questions, each with hints and explanations. Get ready for your exam!

Multiple Choice

What is the surface area of a rectangular prism with length 8, width 3, and height 5?

Explanation:
Finding the surface area of a rectangular prism means adding up the areas of all six faces. The formula is 2(lw + lh + wh). With length 8, width 3, and height 5, compute lw = 24, lh = 40, and wh = 15. Add them: 24 + 40 + 15 = 79. Double that for the two of each face: 2 × 79 = 158. So the surface area is 158 square units.

Finding the surface area of a rectangular prism means adding up the areas of all six faces. The formula is 2(lw + lh + wh). With length 8, width 3, and height 5, compute lw = 24, lh = 40, and wh = 15. Add them: 24 + 40 + 15 = 79. Double that for the two of each face: 2 × 79 = 158. So the surface area is 158 square units.

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