Hello, turbod15b!

Your dimensions are a bit off . . . Code:

30
*-------*
| |
| |45
| |
| *
170 | : *
| (2) : *
| : *
| :125 *
| : *
| : 130 * 60
* - - - * - - - - - - *---------------*
| |
30| (1) |30
| |
*-------------------------------------*
220

Rectangle (1) : .$\displaystyle 220 \times 30\:= 6600\text{ mm}^2$

Rectangle (2): .$\displaystyle 170 \times 30 \:=\:5100\text{ mm}^2$

Triangle: .$\displaystyle \frac{1}{2}(130)(125) \:=\:8125\text{ mm}^2$

Circle: .$\displaystyle \pi(25^2)\:\approx\:1963.5\text{ mm}^2$

Total area: .$\displaystyle 6600 + 5100 + 8125 - 1963.5\:=\:17,861.5\text{ mm}^2$

Total volume: .$\displaystyle 17,861.5\text{ mm}^2 \times 3\text{ mm} \;=\;53,584.5\text{ mm}^3$