杭州交通信息网增强身体素质英语:一道英文的数学题,请大家帮忙,不太难的.
来源：百度文库 编辑：杭州交通信息网 时间：2024/05/06 12:17:01
A fishing boat broke down after traveling 2 hours against a 4km/h current. The boat was carried back to its starting point by the current. The whole trip took 5.5 hours. Find the speed of the boat in still water before the motor failed.
最好是用The system of equation.
多谢了!
最好是用The system of equation.
多谢了!
设船速是V则:
2*(V-4)=4*(5.5-2)
v=11km/h
我对题目没有完全理解
意思是不是
船开两小时出问题了，此时速度4km/h,然后立刻返回，整个旅途用去5.5小时，求船在静止水中的速度，且在电机坏掉前到达
作不出来啊
太简单，一道五年级竞赛题，想知道，ylsx54@126.com