问题标题：
有一道英数题,twoplacesxandyare100kilometersapart.threepeoplea,bandcleavexatthesametimefory.AdriveswithCat25kilometersperhour.Bwalksat5kilometersperhour.afteraperiodoftime.CgetsoffA'scarandwalksat5
问题描述：
有一道英数题,
twoplacesxandyare100kilometersapart.threepeoplea,bandcleavexatthesametimefory.AdriveswithCat25kilometersperhour.Bwalksat5kilometersperhour.afteraperiodoftime.CgetsoffA'scarandwalksat5kilometersperhourwhileAdrivesbacktogetBandthentheytraveltogetherinthecattogotoy.finally,thethreepeoplegettoyatthesametime.HowlongdoesittakethemtogettoYfromX
黄黎芬回答：
两地xy距离100km3人abc从x同时出发向yac开车,25km/hb走路5km/hc在中途某地下车,然后步行5km/h此时a往回开指导遇到b,然后一起乘车三人同时到达求从x-y所花时间分三时段t1t2t3第一阶段B走路ac乘车,时间t1第二阶段B走路...
点击显示
英语推荐
热门英语推荐