Final answer:
The ratio of the length of the tile to the length of the board is 2:1.
Step-by-step explanation:
The ratio of the length of the tile to the length of the board can be found by comparing their respective measurements in feet. The length of the tile is 1/3 ft and the length of the board is 1/2 yd. To compare them, we can convert the length of the board from yards to feet. We know that 1 yd is equal to 3 ft. So 1/2 yd is equal to (1/2) * 3 ft = 3/2 ft. Therefore, the ratio of the length of the tile to the length of the board is 1/3 ft : 3/2 ft. Simplifying this ratio, we get 2:9. Therefore, the correct answer is c) 2:1.