Ariverflowsat2km/h,andjohntakes6htorow16kmtouptheriverand16kmback.Howfastdidherow?PS:answer:3.74km/h
2020-10-22 161次 反馈错误 加入收藏 正确率 : 100%
题目内容：
A river flows at 2km/h,and john takes 6h to row 16km to up the river and 16 km back.How fast did he row?
PS:answer:3.74km/h
优质解答
16/(x+2)+16/(x-2)=6
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