This Contour Map is part of Section C and should be used for answering the Geology Geometry Option (Question C-1) - Leaving Cert DCG - Question 1 - 2014

Point C is situated along the contour line which indicates an elevation of 40 meters.

Point D corresponds to the contour line showing an elevation of 45 meters.

Point E is at a contour line indicating an elevation of 55 meters.

The elevation changes from 35 meters at B to 40 meters at C. The slope can be calculated as:

$ext{Slope} = \frac{\text{Change in elevation}}{\text{Horizontal distance}} = \frac{40 - 35}{\text{Distance from B to C}}$

Between points C and D, the elevation increases from 40 meters to 45 meters. The formula for slope is:

$ext{Slope} = \frac{45 - 40}{\text{Distance from C to D}}$

The elevation rises from 45 meters at D to 55 meters at E. The slope is calculated using:

$ext{Slope} = \frac{55 - 45}{\text{Distance from D to E}}$