甲、乙两队从两端向中间修一条330米的公路,甲队每天修15米,修2天后,乙队也来修,共同修了10天后,两队还相距30米,乙队每天修多少米? A. 16...

作者: rantiku 人气: - 评论: 0
问题 甲、乙两队从两端向中间修一条330米的公路,甲队每天修15米,修2天后,乙队也来修,共同修了10天后,两队还相距30米,乙队每天修多少米? A. 16 B. 10 C. 15 D. 12
选项
答案 D
解析 假设以每天修X米,甲修2天之后乙开始修,共同修了10天,则12×15+10X=330-30,X=12米,故答案为D。

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