Question: Fieldwork 4 PRACTICE PROBLEM 1. Four hills A, B, C and D are in straight line. The elevations are A = 247 m., B =

Fieldwork 4 PRACTICE PROBLEM 1. Four hills A, B, C and D are in straight line. The elevations are A = 247 m., B = 236 m., C = 314 m., and D = 396 m., respectively. Find the height of equal towers on A and D to sight over B and C with a 3 m. clearance. Consider the effect of curvature and refraction of the earth. 235m 314m 396m 247m 12 km 45 km 60 km

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