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GATE 2024 CE (CE1) – Question 45

Geomatics Engineering · Maps, scale, coordinate systems, cartography and map projections · 2 marks · Multiple choice

A map is prepared with a scale of 1: 1000 and a contour interval of 1 m. If the distance between two adjacent contours on the map is 10 mm, the slope of the ground between the adjacent contours is

  1. 30%
  2. 10%
  3. 35%
  4. 40%

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Correct answer: (B) 10%

Explanation

At the scale 1:1000, 10 mm on the map is 10 m on the ground. The vertical difference is the contour interval of 1 m, so the slope is $\frac{1}{10} = 10\%$.