Question 65

A contour line connects points of equal elevation above sea level. The contour interval is given as 25 m.

Inspect the location of each village relative to the 525 m contour line:

1. Village P: Located inside the high peak on the left. The contour lines around P increase inward from 500 m to 525 m, 550 m, and 575 m. Since P lies inside the 575 m contour loop, its elevation is greater than 575 m (well above 525 m).

2. Village Q: Located on the ridge/peak in the upper right. The contour line enclosing Q is labeled 525 m, with the outer contour being 500 m. This indicates the elevation increases inward, so village Q has an elevation greater than 525 m.

3. Villages R, S, and T:

   • Village R lies in a lower region outside the 500 m contour, at an elevation below 500 m.
   • Village S lies in the lower plain outside the 500 m contour, at an elevation below 500 m.
   • Village T lies in the low ground between the contours, at an elevation below 500 m.

When the water level rises to 525 m during the flood, any location with an elevation $\le 525\text{ m}$ is submerged.

• Villages P and Q have elevations $> 525\text{ m}$ and remain above water.
• Villages R, S, and T have elevations below 525 m and get submerged.

Therefore, the villages that get submerged are R, S, and T.