S = 80.00 m, θ = +12°00', h_i = 1.55 m, h_t = 1.55 m. Point A elev = 100.00 m. Find elev_B.
1. Δh
Δh = 80.00 sin 12° = 80.00 × 0.20791 = 16.63 m.
2. Heights cancel
h_i = h_t so Elev_B = 100.00 + 16.63 = 116.63 m.
Answer: Elev_B = 116.63 m
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