An architect's blueprint uses a scale of 1:20. How many centimetres tall should a 1.8 m door be on the blueprint?
Show step-by-step solution
Answer: 9 cm
- Convert to centimetres: .
- Scale down: cm.
Back to the problem bank Challenge
Term 1 · Weeks 6–9 · Units and Conversion
Challenge problem
Common errors to watch for
- Dividing 1.8 by 20 and forgetting to convert metres to centimetres.
Budget of Work competencies
- gm11.t1.w8.c1
Use a scale to interpret and compare distances on maps, blueprints, and sketches. - gm11.t1.w6.c2
Convert measurements with different units in the same system and between different systems.