Answer:
3060

Explanation:
Find the cross-sectional area first of the trapezium

So,

which is 40 / 2 x 15 = 20 x 15 = 300

Since there are 2 trapeziums (on the front and back): 300 x 2 = 600

Find the Area of the Rectangles
The first rectangle on the top would be: 6x30 = 180

The slanted rectangle on the right would be: 25x30 = 750

The rectangle on the bottom would be: 30x34 = 1020

The hidden rectangle on the left would be: 17 x 30 = 510

So by combining all these calculations, you will get the total surface area which is:
600 + 180 + 750 + 1020 + 510 = 780 + 1770 + 510 = 2550 + 510 = 3060
