[問題] 100公尺長隊伍
有一個行進中的隊伍100公尺長
有一位小兵從隊伍最末端跑到排頭 然後又跑回末端 沒有停留
這段時間隊伍剛好移動了100公尺
小兵與隊伍都是等速移動
請問小兵這段期間總移動距離多少?
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吃到飽吃完學長講的提目 但是大家腦袋空空懶得想
回來想算卻一直不得要領...
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