GATE ECE 2017 Set 1 | GA | Question: 10

Question

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.

 

The path from $P$ to $Q$ is best described by

• A. Up-Down-Up-Down
• B. Down-Up-Down-Up
• C. Down-Up-Down
• D. Up-Down-Up

Comments

This question came in CS too

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@srestha

question is different please see clearly

Answer 1

The line starts from $P$ which is inside $575$ contour line.

Then line crosses the contour lines $575\rightarrow550\rightarrow525\rightarrow500$. Down

Then it crosses the contour lines of $500\rightarrow525\rightarrow550\rightarrow575$ Up

Then it crosses the contour lines $575\rightarrow550$ and then stops at $Q$ which is inside the contour line $525$. Down

$\therefore$ Option C Down up Down is the correct answer.

Answer 2

If we look closely at the contours and the given info that contours are placed at “25 m” difference in altitude level,we can observe that P is located little above 575 m above sea level.

1. It goes down from 575 m to 500 m.
2. It then goes up and crosses 575 m mark on the other side as can be observed from the picture.
3. Then it goes down from 575 m and crosses 550 m.

So the sequence is <Down,up,Down>