An architect draws a building at a scale of 1:200. On the drawing, a wall measures 7.5 cm. A door in that wall is shown as 0.45 cm wide on the drawing. What is the actual width of the door in metres?

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EEJ MAIN Aptitude QUESTION #10921

Question 1

An architect draws a building at a scale of 1:200. On the drawing, a wall measures 7.5 cm. A door in that wall is shown as 0.45 cm wide on the drawing. What is the actual width of the door in metres?

0.90 m✔️
0.45 m
1.80 m
0.60 m

Correct Answer Explanation

Scale 1:200 means 1 cm on drawing = 200 cm = 2 m in reality.

Actual door width = \(0.45 \times 200 = 90\ \text{cm} = \mathbf{0.90\ \text{m}}\

The wall length = \(7.5 \times 200 = 1500\ \text{cm} = 15\ \text{m}\ (given for context/distraction).

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