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GATE CSE 2024 | Set 1 | GA: 9

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A rectangular paper of $20 \mathrm{~cm} \times 8 \mathrm{~cm}$ is folded $3$ times. Each fold is made along the line of symmetry, which is perpendicular to its long edge. The perimeter of the final folded sheet (in $\mathrm{cm}$ ) is

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