Susan is going to build a large wooden storage box. The box will be in the shape of a rectangular prism, as shown below. She wants to cover all the sides of the box with special wallpaper that costs 3$ per square foot. How much will the wallpaper cost in total?

Given:

Length = 5 ft

Width = 2 ft

Height = 5 ft

To find:

The cost of total wallpaper.

Solution:

Total surface area = 2(lw + wh + lh)

                               = 2(5 × 2 + 2 × 5 + 5 × 5)

                               = 2(10 + 10 + 25)

                               = 2(45)

Total surface area = 90 ft²

Cost of wallpaper per square foot = $3

Cost of wallpaper for 90 square feet = 3 × 90

                                                             = $270

Therefore total cost of wallpaper is $270.

135 is your answer

step-by-step explanation:

try 180 times three then divide that number by 4 (sides) to get your answer. im glad to : )