When tyson opens a cereal box and lays it out flat, he sees that both the top and the bottom of the box measure 3 inches by 9 inches. both sides of the box measures 3 inches by 12 inches, and both the front and back of the box measure 9 inches by 12. what is the surface area of the cereal box?

Step-by-step explanation:

Surface Areas

If some surface is made of smaller parts, the total area can be computed as the sum of the particular areas. The area of a rectangle of dimensions a and b is

The cereal box is made of 6 rectangles. We'll calculate their areas and then add them to find the total area. For the top and the bottom, we compute twice the area of a rectangle

The sides of the box measure 3 inches by 12 inches, their area is

The front and back of the box measure 9 inches by 12

The total area of the flattened cereal box is

a28=58

step-by-step explanation:

a1=a1+(n-1)d

a28= 4+ (28-1)2

a28=4+(27)(2)

a28=4+54

a28=58