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GATE 2024 AG – Question 9

General Aptitude · Spatial Aptitude: Spatial Reasoning and Visualization · 2 marks · Multiple choice

A 20 cm×8 cm paper is folded three times, each time along the symmetry line perpendicular to the current longer edge. Find final perimeter in cm.

  1. 18
  2. 24
  3. 20
  4. 21

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Show answer and explanation

Correct answer: (A) 18

Explanation

The first fold halves20 to 10,producing10×8. The second halves10 to 5,producing5×8. Now8 is the longer dimension, so the third fold halves8 to 4,producing5×4. Perimeter=2(5+4)=**18 cm, A**. The longer direction must be reassessed after each fold.

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