GATE CS 2017 Set 2 — Question 65
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General Aptitude → Quantitative Aptitude → Data Interpretation (Bar, Pie, Graphs, Tables)
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Question
An air pressure contour line joins locations in a region having the same atmospheric pressure. The following is an air pressure contour plot of a geographical region. Contour lines are shown at bar intervals in this plot.
If the possibility of a thunderstorm is given by how fast air pressure rises or drops over a region, which of the following regions is most likely to have a thunderstorm?
Correct answer
(C) R
Solution
The likelihood of a thunderstorm is determined by the rate of change of air pressure over a region. In a contour map, the rate of change (gradient) of the plotted variable is represented by the spacing between the contour lines:
1.Steep Gradient: When contour lines are very close together, it indicates a rapid change in the variable over a short distance.
2.Gentle Gradient: When contour lines are far apart, it indicates a slow change in the variable.
By observing the provided contour plot:- Region has the widest spacing between lines, indicating the slowest pressure change.
- Regions and have moderate spacing.
- Region has the highest density of contour lines, meaning the lines are closest together. This indicates that the air pressure rises or drops most rapidly in region .
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