The accompanying map, located on the back page of Section A, shows ground contours at 5 metre vertical intervals from an area of hilly countryside, similar to that shown below - Leaving Cert DCG - Question C-1. - 2015

3. Draw parallel lines at 5m intervals to show changes in elevation from point B to C which rises to 70m. The slope will help in calculating the earthworks needed for cutting.
4. Identify intersections with contours and draw the curve to represent the profile of the roadway.

5. Draw required area using a level base at 65m altitude for establishing the car park edge GF.
6. Draw parallel lines at 7.5m intervals to illustrate the area needed for earthworks.

7. Draw required area for this rising edge, indicating a slope that rises to accommodate elevation changes to reach the highest point in the area.
8. Line up parallel lines every 5m to support this calculation.
9. Identify intersections of contours and draw the curve to complete the profile.

10. The strike line can be drawn from borehole P in elevation drawing, including the angles obtained from the respective boreholes Q and R.
11. Determine the strike as the direction of the line formed by the intersection of a horizontal plane with an inclined geological layer, typically indicated on the plan with the elevation and distances.

12. Using the information given, represent the angle of the pipe ST passing from point S to T. Given the height at S is 50m and the angle of descent is 10°, we can use the formula for depth:

$ext{Depth} = ext{Vertical Drop} = ext{horizontal distance} imes an(10°).$ Calculate the horizontal distance to find the actual depth of the pipe at point T.