市政府决定今年将
长的大堤的迎水坡面铺石加固.如图,堤高
,堤面加宽
,坡度由原来的
改成
,则完成这一工程需要的石方数为________
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d29f6165410cfa31cfb29da1f29cc872.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b252ab7df93f7627bb232a5cbdae47fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/386f5889ae7aa13ad09b3cdb4f7f89ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1acf73afe897ced8cdb80e609d8be230.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5616364088131e8f8fb90d1c88ae276e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc5ad46761a13540141a349d6cd601e8.png)
![](https://img.xkw.com/dksih/QBM/2018/11/27/2084768326098944/2086068976091136/STEM/1f1f1a39f8d149a3805473534ed75b35.png?resizew=154)
更新时间:2018-11-29 17:01:06
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【知识点】 坡度坡比问题(解直角三角形的应用)
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