甲乙丙三队按各自的效率合修一条水渠.第一天甲队单独修了这条水渠的1/40,第二天乙丙两队合修了1/8,第三、四天三队合修,四天共修了180米.这条水渠全长是多少米?
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/29 00:38:03
![甲乙丙三队按各自的效率合修一条水渠.第一天甲队单独修了这条水渠的1/40,第二天乙丙两队合修了1/8,第三、四天三队合修,四天共修了180米.这条水渠全长是多少米?](/uploads/image/z/7676940-12-0.jpg?t=%E7%94%B2%E4%B9%99%E4%B8%99%E4%B8%89%E9%98%9F%E6%8C%89%E5%90%84%E8%87%AA%E7%9A%84%E6%95%88%E7%8E%87%E5%90%88%E4%BF%AE%E4%B8%80%E6%9D%A1%E6%B0%B4%E6%B8%A0.%E7%AC%AC%E4%B8%80%E5%A4%A9%E7%94%B2%E9%98%9F%E5%8D%95%E7%8B%AC%E4%BF%AE%E4%BA%86%E8%BF%99%E6%9D%A1%E6%B0%B4%E6%B8%A0%E7%9A%841%2F40%2C%E7%AC%AC%E4%BA%8C%E5%A4%A9%E4%B9%99%E4%B8%99%E4%B8%A4%E9%98%9F%E5%90%88%E4%BF%AE%E4%BA%861%2F8%2C%E7%AC%AC%E4%B8%89%E3%80%81%E5%9B%9B%E5%A4%A9%E4%B8%89%E9%98%9F%E5%90%88%E4%BF%AE%2C%E5%9B%9B%E5%A4%A9%E5%85%B1%E4%BF%AE%E4%BA%86180%E7%B1%B3.%E8%BF%99%E6%9D%A1%E6%B0%B4%E6%B8%A0%E5%85%A8%E9%95%BF%E6%98%AF%E5%A4%9A%E5%B0%91%E7%B1%B3%3F)
甲乙丙三队按各自的效率合修一条水渠.第一天甲队单独修了这条水渠的1/40,第二天乙丙两队合修了1/8,第三、四天三队合修,四天共修了180米.这条水渠全长是多少米?
甲乙丙三队按各自的效率合修一条水渠.第一天甲队单独修了这条水渠的1/40,第二天乙丙两队合修了1/8,第三、四天三队合修,四天共修了180米.这条水渠全长是多少米?
甲乙丙三队按各自的效率合修一条水渠.第一天甲队单独修了这条水渠的1/40,第二天乙丙两队合修了1/8,第三、四天三队合修,四天共修了180米.这条水渠全长是多少米?
三队合修,每天完成1/40+1/8=3/20
这四天,相当于三队合修3天,一共完成3×3/20=9/20
全长:180÷9/20=400米