某长方形长和宽的比是4:3,如果长减少4米,宽增加6米则变成一个正方形,原长方形的面积为( )平方米?A. 900 B. 1200 C. 150...

作者: tihaiku 人气: - 评论: 0
问题 某长方形长和宽的比是4:3,如果长减少4米,宽增加6米则变成一个正方形,原长方形的面积为( )平方米?
选项 A. 900 B. 1200 C. 1500 D. 1800
答案 B
解析 本题考查基础几何问题。设长为4x,宽为3x,4x-4=3x+6,解得x=10,则长方形长40,宽30,面积为30*40=1200

相关内容:长方形,正方形,面积,150...

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