The scenery in Guilin is the best in the world. Elephant trunk mountain in Xiangshan Park in Guilin is the representative of Guilin landscape and the symbol of Guilin city. Xiao Chen (BC), height 1.7

The scenery in Guilin is the best in the world. Elephant trunk mountain in Xiangshan Park in Guilin is the representative of Guilin landscape and the symbol of Guilin city. Xiao Chen (BC), height 1.7 meters, in Lijiang River. In Rt△ABE, AE = be× tan 32,

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.