GATE 2022 ST – Question 5

General Aptitude · Spatial Aptitude: Spatial Reasoning and Visualization · 1 mark · Multiple choice

The diagram shows an art gallery with opaque boundary walls. A stationary guard has a 360° view. Which set lists all marked locations P,Q,R,S from which the entire shaded interior is visible?

P and Q
Q
Q and S
R and S

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Show answer and explanation

Correct answer: (C) Q and S

Explanation

The inward corner blocks the view from either upper arm into the opposite arm,excluding P and R. Q and S lie in the intersection of the inward-facing half-planes of the two notch edges; segments from either point to every part of both arms stay inside the gallery. Thus both can see the whole interior. **C**.

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