Answer:
The correct option is 1.
Step-by-step explanation:
The wedge contain 3 different rectangles and 2 congruent triangles.
Area of a triangle is
From the given figure it is clear that base of the both triangles is 4 ft and height is 3 ft.
Area of a triangle is
Area of a rectangle is
Length and width of the first rectangle are 6 ft and 3 ft respectively. So, the area first rectangle is
Length and width of the second rectangle are 6 ft and 4 ft respectively. So, the area second rectangle is
Length and width of the third rectangle are 6 ft and 5ft respectively. So, the area third rectangle is
The total area of this wedge is
The area of wedge is 84 square ft.
Therefore, option 1 is correct.