已知长方形的周长为20厘米,如果长是宽的3/2倍,那么这个长方形的面积是多少平方厘米?
已知长方形的周长为20厘米,如果长是宽的3/2倍,那么这个长方形的面积是多少平方厘米?
数学人气：680 ℃时间：2020-02-03 00:52:23
优质解答
设宽是x,则长是1.5x,依题意得2*(x+1.5x)=20,x=4,长是1.5*4=6,所以面积是4*6=24平方厘米.
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