I am guessing you are wanting to find the volume.
Volume= area of cross-section × length
The area of the cross-section is the triangle is 15 cm². 15 cm² × 32cm is 480cm³. Therefore the answer is 480cm³
If you are finding the surface area, the two triangles add up to 30cm. Then each rectangle is 160cm. There are 3 rectangles and 160x3= 480. 480+30= 510cm.
The surface area is 510cm and the volume is 480cm³.
