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Technical Drawing  Exam Papers  Higher  1994  BuildingQuestion 5(a) On a contour map A and B are two points whose altitudes are 110 m and 90 m, respectively. A skew borehole at B is drilled in a southerly direction in plan and has an actual inclination of 45° to the horizontal plane. It reveals the top and bottom surfaces of the stratum at distances of 15 m and 90 m, respectively from B. Determine the dip, strike and thickness of the stratum. (b) Draw the projections of another skew borehole drilled at an angle of 70° to the horizontal Plane from A and which reaches the bottom surfaceof the stratum at a distance of 100 m from A. Scale 1 : 1000 


