—件工作,甲独做要12小时,乙独做要18小时,若由甲先做1小时,然后再由乙接替甲做1小时,再由甲接替乙做1小时……两人如此交替工作,完成任务共用多少小时?...

作者: tihaiku 人气: - 评论: 0
问题 —件工作,甲独做要12小时,乙独做要18小时,若由甲先做1小时,然后再由乙接替甲做1小时,再由甲接替乙做1小时……两人如此交替工作,完成任务共用多少小时?( )
选项
答案 D
解析

相关内容:工作,甲独,12小时,乙独,18小时,甲先,1小时,甲做,乙做,小时

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