Carpenter Red Seal Exam Prep · Question
A drawing indicates a detail at scale 1:20. If a worker needs to cut a piece of trim that measures 75 mm on this detail drawing, what is its actual length?
With a 1:20 scale, 1 unit on the drawing represents 20 units in reality. So, 75 mm on the drawing equates to 75 mm * 20 = 1500 mm, which is 1.5 metres.
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Question: A drawing indicates a detail at scale 1:20. If a worker needs to cut a piece of trim that measures 75 mm on this detail drawing, what is its actual length?
Answer options:
- 3.75 m (12 feet 4 inches) ✅ 1.5 m (4 feet 11 inches)
- 0.75 m (2 feet 5 inches)
- 15 m (49 feet 2 inches)
Correct answer: 1.5 m (4 feet 11 inches)
Explanation: With a 1:20 scale, 1 unit on the drawing represents 20 units in reality. So, 75 mm on the drawing equates to 75 mm * 20 = 1500 mm, which is 1.5 metres.
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