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Technical Drawing - Exam Papers - Higher - 2000 - BuildingQuestion 5On a contour map A and B are two points whose altitudes are 90 m and 70 m
respectively. On the map B is located 90 m north-east of A. A skew bore-hole at A is
drilled in a north-westerly direction in plan and has an actual inclination of 60° to the
horizontal plane. It reveals the top and bottom surfaces of a stratum at altitudes of A skew bore-hole at B is drilled in a south-westerly direction in plan and has an actual inclination of 50° to the horizontal plane. It reveals the top and bottom surfaces of the stratum at altitudes of 70 m and 45 m, respectively. (a) Determine the dip, strike and thickness of the stratum. (b) Another skew bore-hole at A is drilled in a northerly direction in plan and has an actual inclination of 65° to the horizontal plane. Determine the true inclination of this bore-hole to the stratum. Scale 1 : 1000 ![]() |
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