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An instrument is set-up at point M and vertical angles are observed at N (-21°15') and O (+33°45'). The height of instrument from point M is 1.5865m. The horizontal distance of NM and NO are 35G.2552m and 9GF.5565m respectively. If point O is at elevation 6AE.6453m, a. Determine the elevation of N neglecting the effects of curvature and refraction. b. Determine the elevation of N making due allowance for curvature and refraction.

An instrument is set-up at point M and vertical angles are observed at N (-21°15') and O (+33°45'). The height of instrument from point M is 1.5865m. The horizontal distance of NM and NO are 35G.2552m and 9GF.5565m respectively. If point O is at elevation 6AE.6453m, a. Determine the elevation of N neglecting the effects of curvature and refraction. b. Determine the elevation of N making due allowance for curvature and refraction.

Structural Analysis
Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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An instrument is set-up at point M and vertical angles are observed at N (-21°15') and O (+33°45'). The height of instrument from point M is 1.5865m. The horizontal distance of NM and NO are 35G.2552m and 9GF.5565m respectively. If point O is at elevation 6AE.6453m, a. Determine the elevation of N neglecting the effects of curvature and refraction. b. Determine the elevation of N making due allowance for curvature and refraction.
Transcribed Image Text:An instrument is set-up at point M and vertical angles are observed at N (-21°15') and O (+33°45'). The height of instrument from point M is 1.5865m. The horizontal distance of NM and NO are 35G.2552m and 9GF.5565m respectively. If point O is at elevation 6AE.6453m, a. Determine the elevation of N neglecting the effects of curvature and refraction. b. Determine the elevation of N making due allowance for curvature and refraction.
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