解下列方程(组)
(1)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84ce7b114e63595d3818b2d66bb2884b.png)
(2)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84ce7b114e63595d3818b2d66bb2884b.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ff74463508d733e3d2a08ae0f350f0d.png)
更新时间:2024-05-18 11:24:08
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相似题推荐
解答题-问答题
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适中
(0.65)
【推荐1】(1)求满足
的未知数
的值.
(2)如图,为修铁路需凿通隧道
,测得
,
,
,若每天凿0.2 km,则需要几天才能把隧道
凿通?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c96c3bd7621beb33b3dd551ce1fd785d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)如图,为修铁路需凿通隧道
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/225c56a2c4e5d00893595b161b9b5481.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd922559a6ec96cdde5ef1b32fc5e955.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d43196011f26ecba93218f51226c23e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/2020/10/10/2568146929688576/2568182857613312/STEM/b93d7d4315204d9b8b5536c75b444c8d.png?resizew=118)
您最近一年使用:0次
解答题-计算题
|
适中
(0.65)
【推荐2】小燕在测量铅球的半径时,先将铅球完全浸没在一个带刻度的圆柱形小水桶中,拿出铅球时,小燕发现小水桶中的水面下降了
,小燕量得小水桶的直径为
,于是她就算出了铅球的半径.你知道她是如何计算的吗?请求出铅球的半径.(球的体积公式
,r为球的半径.)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84a3d448d4e52782ca2024411c5a11fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bc6a8e3c0184a6f39ba69966efee510.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab8dd1a91f4087c0386c9d1d50a22c72.png)
您最近一年使用:0次