Question

Jocelyn sells custom made jewellery on her website. She is designing the

box for shipping orders to her customers. She wants to make a box 9 in
long, 5 in wide, and 3 in tall. How much cardboard is needed to make the
box?

Answer 1

174 square inches

Explanation:

We need to find the Surface Area of the outside of the box. Since the box is 9in x 5in x 3in, there will be two rectangular sides with each of the following dimensions -- 9x5, 5x3, and 9x3.

1. Find the areas for each rectangular dimension:
9x5=45; 5x3=15; 9x3=27

2. Multiply each of those by 2 (to account for there being two of each):
45x2=90; 15x2=30; 27x2=54

3. Add the products from step 2 together: 90+30+54 = 174