根据规划设计,某市工程队准备在开发区修建一条长300米的盲道.铺

根据规划设计,某市工程队准备在开发区修建一条长300米的盲道.铺设了60米后,由于采用新的施工方式,实际每天修建盲道的长度比原计划增加10米,结果共用了8天完成任务,该工程队改进技术后每天铺设盲道多少米?

答案

:设该工程队改进技术后每天铺设盲道x米,则改进技术前每天铺设(x-10).

  根据题意,得.

  整理,得2x2-95x+600=0.

  解得x1=40 ,x2=7.5.

  经检验x1=40 ,x2=7.5都是原方程的根,但x2=7.5不符合实际意义,舍去,

  ∴x=40.

  答:该工程队改进技术后每天铺设盲道40.

  

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