Question

Joseph needs to buy insulation for the inside of a truck container. The container is a rectangular prism 12 feet long, 7 feet wide, and 6.5 feet high. How much insulation should Joseph buy if all surfaces except the floor are to insulated?

Answer 1

Joesph needs to be 331 feet of flooring to cover all sides except the floor.

Explanation:

To answer this question, you need to find the areas of the sides and the roof.

Side (left and right): 12 feet long multipled by 6.5 feet high. 12*6.5=78 ft^2. Multiply this by 2 to get the combined areas of both the left and right side. 156 ft ^2

Side (back and front): 7 feet wide by 6.5 feet high. 7*6.5=45.5 ft^2. Multiply this by two to get the combined areas of the back and the front sides. 91 ft^2

Roof: 7 feet wide multiplied by 12 feet long. 7*12=84 ft^2

84+91+156=331 ft^2

Answer 2

331 ft²

Explanation:

Area of a rectangle = width × height

Given:

• base width = 7 ft
• base length = 12 ft
• height = 6.5 ft

Surface area (minus the floor):

= 2(7 × 6.5) + 2(12 × 6.5) + (7 × 12)

= 91 + 156 + 84

= 331 ft²