Guilin AE recruitment

In Rt△ADE, AE=DE×tan70,

BD = 66m，BE=BD+DE=66+DE，

∴DE×tan70 =(66+DE)×tan32，

∴2.747×DE=0.625×(66+DE)，

The solution is DE= 19.4,

∴ AE = de× tan70 = 53.29 ≈ 53.3m，

∴ ao = 53.3+ 1.7 = 55m。

That is, the height AO of Elephant Trunk Mountain above the water surface is about 55 meters.