Question

修一条公路,甲乙两队合作要8天完成,甲队单独修12天完成，实际上先由乙队修了若干天后，再由甲队继续修，

全部修完时共用了15天，求甲，乙两队各修了几天

Answer 1

乙队单独修完成用1÷（1/8-1/12）=24天
设甲队修了X天
X/12+（15-X）/24=1
2X/24+(15-X)/24=1
2X+15-X=24
X=9
15-X=15-9=6
答：甲队修了9天，乙队修了6天。

祝你开心

Answer 2

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