Question

Nelda needs to wrap a holiday gift box. The box is in the shape of a rectangular prism with the dimensions shown.

What is the total surface area of the gift box?

Record your answer and fill in the bubbles on your answer document. Be sure to use the correct place value.

Answer 1

`416 \;in^2`

Explanation:

The surface area of the rectangular prism

`S = 2(lw + lh + wh)`

where

l = length = 12 in

w = width = 10 in

h = height = 4 in

Therefore

`S = 2(12\cdot 10 \;+ \; 12\cdot 4 \;+\;10 \cdot 4)\\\\= 2(120 + 48 + 40)\\\\= 2 (208)\\\\= 416 \: in^2`