已知船在静水中的速度为
km/h,水流速度为
km/h,某轮船顺水航行了5h后又逆水航行了2h,则此轮船共航行了_______________ km.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
更新时间:2019-12-11 15:45:52
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【推荐1】某校现要对如图所示的一块长方形空地进行种花美化,长方形的长
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