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GATE CE 2020 Set 2 — Question 65

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NAT+2 / -0MediumTrigonometric LevellingLevellingGeomatics Engineering

Geomatics Engineering → Levelling → Trigonometric Levelling

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Question

A theodolite is set up at station A. The RL of instrument axis is 212.250 m. The angle of elevation to the top of a 4 m long staff, held vertical at station B, is 7∘7^\circ. The horizontal distance between stations A and B is 400 m. Neglecting the errors due to curvature of earth and refraction, the RL (in m, round off to three decimal places) of station B is ___________.
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