Question

a cereal box has a length of 8 inches, a width of 1 3/4 inches, and a height of 12 1/8. What is the surface area of the box?

Answer 1

270 7/16 in^2.

Explanation:

The surface area equals the sum of the areas of 3 pairs of congruent rectangles.

These are 2 * 8 * 1 3/4 + 2 * 8 * 12 1/2 + 2 * 1 3/4 * 12 / 1/8

= 16 * 7/4 + 16 * 25/2 + 2 * 7/4 * 97/8

= 28 + 200 + 42 7/16

= 270 7/16 in^2.