一根绳子测量课桌,两折来量长0.6米,三折量短0.1米,求绳子长度?

问题描述:

一根绳子测量课桌,两折来量长0.6米,三折量短0.1米,求绳子长度?

4.2

设绳子长x:
x/2-0.6=x/3+0.1
x/6=0.7
绳长x = 6*0.7=4.2m
课桌长:x/2-0.6=2.1-0.6=1.5m

设绳子长x米
则x/2-0.6=x/3+0.1
x/2-x/3=0.1+0.6
x/6=0.7
x=4.2
答:绳子长4.2米