一件工作，甲乙合作6天完成，乙丙合作10天完成，甲丙合作3天，乙再做12天也可以完成，乙独做多少天可以完成？_刷题宝

题干

一件工作，甲乙合作6天完成，乙丙合作10天完成，甲丙合作3天，乙再做12天也可以完成，乙独做多少天可以完成？

上一题下一题 0.0难度选择题更新时间:2012-03-21 07:56:23

答案(点此获取答案解析）

解：①乙的工作效率：1﹣（

1

6

×3+ 10

1

×3）÷（12﹣6），

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