甲乙两车同时从ab两地相对开出 几小时后在距中点40㎞处相遇.已知甲速是乙速的5/7,ab两地相距多少米?
15分内追加悬赏!!!!!!!!!!!!!!!!快快快快快快快快快快快快快快快快快快快快快快快快快快快快快快快快快快!!!!!!!!!!!!!!!!!!!!!!!...
15分内追加悬赏!!!!!!!!!!!!!!!!快快快快快快快快快快快快快快快快快快快快快快快快快快快快快快快快快快!!!!!!!!!!!!!!!!!!!!!!!
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