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GATE 2017 EE – Question 10

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

A contour line joins locations having the same height above the mean sea level. The following is a contour plot of a geographical region. Contour lines are shown at 25 m intervals in this plot. If in a flood, the water level rises to 525 m, which of the villages P, Q, R, S, T get submerged?

A contour map with labelled lines at 425, 450, 500 and 550 m. Village P is on a hilltop inside the 550 m contour. Village Q is in the top right corner. Village R is above the central hill. Village S is inside a small low area marked 450 and 500 m. Village T is near the 500 m line on the right.
  1. P, Q
  2. P, Q, T
  3. R, S, T
  4. Q, R, S

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Correct answer: (C) R, S, T

Explanation

Water at 525 m covers every place below 525 m. Village P sits on a hilltop inside the 550 m contour, so it stays dry. Villages R, S and T are in lower ground, below the 525 m level, so they are submerged.