The GATE Grind

GATE 2025 CE (CE2) – Question 19

Transportation Infrastructure · Airport runway length, taxiway and exit taxiway design · 1 mark · Multiple choice

After applying the correction for elevation and temperature, the runway length is 700 m. The corrected runway length (in m) for an effective gradient of 1% is ______ (round off to the nearest integer).

  1. 840
  2. 700
  3. 720
  4. 740

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Correct answer: (A) 840

Explanation

The runway length is increased by 20% for each 1% of effective gradient. So the corrected length is $700 \times 1.2 = 840$ m.