To find the length of the new scaled drawing in boxes, first, we need to determine the length of the tabletop in inches based on the original scale.
Given:
- Original scale: 1 box = 3 inches
- Length of the tabletop in the original drawing: 10 boxes
Now, calculate the length in inches: 10 boxes * 3 inches/box = 30 inches
Next, we need to apply the new scale, which is 1 box = 2 inches, to find out how many boxes correspond to the same length of 30 inches.
Using the new scale, we calculate the length in boxes: 30 inches ÷ 2 inches/box = 15 boxes
Thus, the length of the new scaled drawing in boxes will be 15.
The answer is B. 15.