A stadia reading is recorded to have an upper cross hair reading of 1.655 m and a lower cross hair reading of 1.510 m. The zenith angle is 82º 45’ 10” and the height of instrument is recorded as 1.450 m. Calculate the horizontal distance between the instrument and the staff position and the RL of the ground surface at the staff position, if the RL at the instrument location is 50.345 m at ground level.

Structural Analysis
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Author:KASSIMALI, Aslam.
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Chapter2: Loads On Structures
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  1. A stadia reading is recorded to have an upper cross hair reading of 1.655 m and a lower cross hair reading of 1.510 m. The zenith angle is 82º 45’ 10” and the height of instrument is recorded as 1.450 m. Calculate the horizontal distance between the instrument and the staff position and the RL of the ground surface at the staff position, if the RL at the instrument location is 50.345 m at ground level.
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