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> 列方程解应用题:某一工程进行招标时,接到了甲、乙两个工程队的投标书,施工1天需付甲工程队工程款1.5万元,付乙工程队工程款1.1万元,工程领导小组根据甲、乙两队的投标书-八年级数学
列方程解应用题:某一工程进行招标时,接到了甲、乙两个工程队的投标书,施工1天需付甲工程队工程款1.5万元,付乙工程队工程款1.1万元,工程领导小组根据甲、乙两队的投标书-八年级数学
题目简介
列方程解应用题:某一工程进行招标时,接到了甲、乙两个工程队的投标书,施工1天需付甲工程队工程款1.5万元,付乙工程队工程款1.1万元,工程领导小组根据甲、乙两队的投标书-八年级数学
题目详情
列方程解应用题:
某一工程进行招标时,接到了甲、乙两个工程队的投标书,施工1天需付甲工程队工程款1.5万元,付乙工程队工程款1.1万元,工程领导小组根据甲、乙两队的投标书测算,可有三种施工方案:
方案(1):甲工程队单独完成这项工程,刚好如期完成;
方案(2):乙工程队单独完成这项工程,要比规定日期多5天;
方案(3):若甲、乙两队合作4天,余下的工程由乙工程队单独做,也正好如期完成;
在不耽误工期的情况下,你觉得哪种方案最省钱?请说明理由。
题型:解答题
难度:中档
来源:期中题
答案
解:在不耽误工期的情况下,我觉得方案(3)最省钱。
理由:设规定日期为x天,则甲工程队单独完成这项工程需x天,乙工程队单独完成这项工程需(x+5)天,依题意列方程得:
解得x=20
经检验x=20是原方程的解
x+5=20+5=25
方案(1)所需工程款为:1.5×20=30万元
方案(2)所需工程款为:1.1×25=27.5万元
方案(3)所需工程款为:1.5×4+1.1×20=28万元
∴在不耽误工期的情况下,我觉得方案(3)最省钱。
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题目简介
列方程解应用题:某一工程进行招标时,接到了甲、乙两个工程队的投标书,施工1天需付甲工程队工程款1.5万元,付乙工程队工程款1.1万元,工程领导小组根据甲、乙两队的投标书-八年级数学
题目详情
某一工程进行招标时,接到了甲、乙两个工程队的投标书,施工1天需付甲工程队工程款1.5万元,付乙工程队工程款1.1万元,工程领导小组根据甲、乙两队的投标书测算,可有三种施工方案:
方案(1):甲工程队单独完成这项工程,刚好如期完成;
方案(2):乙工程队单独完成这项工程,要比规定日期多5天;
方案(3):若甲、乙两队合作4天,余下的工程由乙工程队单独做,也正好如期完成;
在不耽误工期的情况下,你觉得哪种方案最省钱?请说明理由。
答案
理由:设规定日期为x天,则甲工程队单独完成这项工程需x天,乙工程队单独完成这项工程需(x+5)天,依题意列方程得:
解得x=20
经检验x=20是原方程的解
x+5=20+5=25
方案(1)所需工程款为:1.5×20=30万元
方案(2)所需工程款为:1.1×25=27.5万元
方案(3)所需工程款为:1.5×4+1.1×20=28万元
∴在不耽误工期的情况下,我觉得方案(3)最省钱。