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为叙述方便,将人教版高中数学第一册(上)P55例3引用如下:21世纪游乐园要建造一个直径为20m的圆形喷水池,如图所示(图略).计划在喷水池的周边靠近水面的位置安装一圈喷水头,使喷出的水柱在离池中心4m处达到最高,高度为6m.另外还要在喷水池的中心设计一个装饰物,使各方向喷来的水
For the sake of narrative convenience, the PEP example of the first edition of the PEP mathematics (above) is cited as follows: 21st Century Amusement Park is to build a circular fountain with a diameter of 20m, as shown (not shown). Planned at the fountain Install a ring of sprinkler heads near the water surface so that the sprayed water column reaches a maximum of 4m from the center of the pool, and the height is 6m. In addition, a decorative object is designed in the center of the fountain to spray water in all directions.