The accompanying drawing shows ground contours at ten-metre vertical intervals on a map.
(a) On the drawing supplied draw a vertical section (profile) on the line DE.
(b) A, B and C are outcrop points on the surface of a stratum of ore. Determine the dip and strike of the stratum.
(c) An object stands vertically on the ground at F. Determine the minimum height of the object if it is visible from the ground at G.