Answer:
144 cm²
Step-by-step explanation:
A prism's surface has 2 triangles & 3 rectangles.
In both the triangles , length of :
Perpendicular = 4 cm
Base = 6 cm
So , Area of both triangles =
In the 3 rectangles ,
Length = 8 cm
Width = 5 cm
So , Area of the rectangles =
Hence the total surface area of the prism is = 120 + 24 =144 cm²
Using the perimeter of a rectangle, it is found that she can make a deck of 122 ft wide.
<h3>What is the perimeter of a rectangle?</h3>The perimeter of a rectangle of length l and width w is given by:
In this problem:
Then:
She can make a deck of 122 ft wide.
You can learn more about the perimeter of a rectangle at brainly.com/question/10489198