17. (6 points) As shown in the figure, a rectangular wooden block 10 meters long is sawed into 6 segments, and the surface area increases by 100 square decimeters compared to the original. The original volume of this rectangular wooden block is $\qquad$ cubic decimeters.
【Answer】Solution: According to the problem, we have:
A rectangular wooden block 10 meters long is sawed into 6 segments, and the surface area increases by 100 square decimeters. The surface area increases by 10 faces, so the area of each face is $100 \div 10=10$ square decimeters.
10 meters $=100$ decimeters.
Volume: $10 \times 100=1000$ (cubic decimeters).
Therefore, the answer is: 1000