Cereal is packaged in a box shaped like a rectangular prism with a base 7.5 inches by 2 inches and a height of 10 inches. Manufacturing each box requires 10% more cardboard than the box's surface area. How much cardboard is needed to make each box?

The first thing we must do in this case is to calculate the surface area of the rectangular prism.

We have then:

A = 2 * ((L * h) + (L * w) + (h * w))

Where,

L: long

w: width

h: height

Substituting the values:

A = 2 * ((7.5 * 10) + (7.5 * 2) + (10 * 2))

A = 220

Then, "Manufacturing each box requires 10% more cardboard than the box's surface area"

Ar = 220 * 1.10

Ar = 242

242-220 = 22

Answer:

is needed 22 in ^ 2 cardboard to make each box