a. That prism is composed of two similar triangles and 3 different rectangles. The area of a triangle is A = (base*height)/2. The area of a rectangle is A = length*width.
Surface area = 2*[(16*12)/2] + 32*20 + 12*32 + 16*32 = 1728 cm^2
b. The surface area of a cone is A = pi*radius*length
A = pi*9*19 = 537 yd^2