Final answer:
The length of the other section of the board after sawing would be (10 - n) feet.
Step-by-step explanation:
If a carpenter sawed a 10-ft board into two sections and one section was n ft long, the length of the other section would be the total length of the board minus the length of the first section.
Since the first section is n ft, we subtract that from the total length:
10 ft - n ft = (10 - n) ft.
Therefore, the other section would be (10 - n) feet long.