To find the surface area of this solid figure we add the area of all the faces
formula for area of triangle = 1/2 * base * height
So Area of two triangles = 2( 1/2 * 3 *2) = 6 in^2
And area of two lateral rectangles = 2( length * width) = 2( 2.5 *7 ) = 2(17.5)= 35 in^2
And area of base rectangle = (3*7) in^2 = 21 in^2
Now adding all the areas we get
(6+35+21) in^2 = 62 in^2
So surface area = 62 in^2
