设长为a 宽为b 则有
a+b=72÷2
b÷a=3÷4
得出a=144/7
b=108/7
S=144/7 * 108/7=15552÷49≈317平方分米
用72分米长的铁丝围成一个长方形,长方形的宽是长的4分之3,这个长方形的面积的多少平方分米?
用72分米长的铁丝围成一个长方形,长方形的宽是长的4分之3,这个长方形的面积的多少平方分米?
要方程和除法
要方程和除法
数学人气：275 ℃时间：2019-09-17 04:30:37
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