First, we need to determine the actual dimensions of the garden based on the blueprint measurements using the scale of 1 inch = 4 feet.
The blueprint shows:
- Width = 3 inches
- Length = 5 inches
Now, we can convert the dimensions from the blueprint to the actual size:
- Actual width = 3 inches × 4 feet/inch = 12 feet
- Actual length = 5 inches × 4 feet/inch = 20 feet
Next, since the actual garden is doubled in size, we need to double the length:
- New length = 20 feet × 2 = 40 feet
Thus, the new length of the garden will be 40 feet.
The correct answer is c. 40 feet.