问题205: Perimeter =62m , Length is 3 times its width. Calculate the length.

$$ \begin{aligned} & \left\{\begin{array}{r} 2 x+2(y+4)=62 \\ y+4=3 x \end{array}\right. \\ & \Rightarrow\left\{\begin{array}{l} x=\frac{31}{4} \\ y=\frac{77}{4} \end{array}\right. \\ & \text { 长为 } y+4=\frac{77}{4}+4=\frac{93}{4}( m ) \end{aligned} $$

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最后修改于3月15日