Two ferries start at the same time from opposite sides of a river.Each travels at a constant speed,but one is faster than the other .They pass at a point 720m from the nearest shore.Both boat wait ten minutes before going back.On the return trip they meet 400m from the other shore .How wide is the river
问题描述：
Two ferries start at the same time from opposite sides of a river.Each travels at a constant speed,but one is faster than the other .They pass at a point 720m from the nearest shore.Both boat wait ten minutes before going back.On the return trip they meet 400m from the other shore .
How wide is the river
答
题的翻译：两艘渡轮分别从河的两岸向对岸驶去。两艘船都以匀速行驶，其中一艘速度比另一艘快。当两船相遇时的地点离最近的河岸有720米的距离。两船到岸后各在岸边停10分钟后返航。当两船再次相遇时离最近的岸边400米。
问：河多宽?
另请高明解一下吧，我暂时没想出来
答
已知：两船匀速渡河,其中一船速度快,相遇时距最近河岸720m；渡河后各停留10min后回返,再次相遇时,距另一河岸400m.求：河宽.假设：起初,A船从河A岸出发,B船从河B岸出发,A船速度V(A)大于B船速度V(B)；且河岸宽L.解题过...