Find the surface area of the following figure

Step-by-step explanation:

We have:

two trapezoids with bases 15ft and 7ft and height 5ft.

four rectangles 5ft × 11ft, 15ft × 11ft, 9.4ft × 11ft and 7ft × 11ft.

The formula of an area of a trapezoid:

b₁, b₂ - bases

h - height

Substitute:

The formula of an area of a rectangle:

l - length

w - width

The dimensions of rectangle l × w

Subtitute:

The surface area of the figure:

[tex]S.A.=2A_t+A_1+A_2+A_3+A_4\\\\S.A.=2(55)+55+165+103.4+77=510.4\ ft^2[/text]

1; 35 is the ratio

step-by-step explanation: