解题方法
1 . 如图,某游泳馆拟建一座平面图形为矩形且面积为200平方米的泳池,池的四周墙壁建造单价为400元/
,中间一条隔壁建造单价为100元/
,池底建造单价为60元/
(池壁厚忽略不计且池的深度一定),欲使总造价最低,则泳池的长应设计为( )米.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/6ca1e040-3c45-44ca-8ea7-b2b5dc2cbced.png?resizew=109)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35c901bcdfa58f0c68ad0161b0bab269.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35c901bcdfa58f0c68ad0161b0bab269.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35c901bcdfa58f0c68ad0161b0bab269.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/6ca1e040-3c45-44ca-8ea7-b2b5dc2cbced.png?resizew=109)
A.13 | B.14 | C.15 | D.16 |
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2021-10-13更新
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2卷引用:河南省豫西名校2021-2022学年高一上学期第一次联考数学试题