均以m为单位计算水的体积为:0.40*0.40*0.40=0.064水的高度为0.064/(0.8*0.25)=0.32m
4分米=0.4米高度=0.4×0.4×0.4÷0.8÷0.25=0.32米=3.2分米
4*4*4/(8*2.5)=3.2分米
0.4*0.4*0.4=0.8*0.25*xx=0.32m