解:(8×8)÷(厅氏如扮启12×8)=2/3设高度为x cm(核正5-x)(12×8)=8×8x480-96x=64x160x=480x=33cm=0.3dm水高0.3分米求采纳,谢谢!
(12X8X5)/(12X8+8X8)=3答案是3cm
12*8*5=480cm³S a=12*8=96cm²消伏谈 S b=8*8=64cm²拿碰厅磨480/(96+64)=3cm=0.3dm