Will give brainliest. you in advance.

We have 3 rectangles and 2 triangles to find the areas of. A total of 5 surfaces. 
The right triangles are identical and only need to calculate 1 and multiply by 2.

Formulas: A of Rectangle = length x width  
Area of right triangle= (base x height)     
                                              2

1) 30 x 17 = 510
2) 30 x 10 = 300
3) 30 x 21 = 630
4) (21 x 8) / 2 = 84
5) (21 x 8) / 2 = 84

Area is Total of the 5 sides = 1,608 cm^2