5dm=0.5m,8dm=0.8dm
表面积=1.2m×0.5m+0.5m×0.8m×2+1.2m×0.8m×2
=0.6m²﹢0.8m²+1.92m²
=3.32m²
5dm=0.5m,8dm=0.8dm
V=长 ×宽×高
=1.2m×0.5m×0.8m
=0.48m³
450L=0.45m³,深即为高
h=体积÷长÷宽
=0.45m³÷1.2m÷0.5m
=0.75m=7.5dm(分米)
5dm=0.5m,8dm=0.8dm
表面积=1.2m×0.5m+0.5m×0.8m×2+1.2m×0.8m×2
=0.6m²﹢0.8m²+1.92m²
=3.32m²
5dm=0.5m,8dm=0.8dm
V=长 ×宽×高
=1.2m×0.5m×0.8m
=0.48m³
450L=0.45m³,深即为高
h=体积÷长÷宽
=0.45m³÷1.2m÷0.5m
=0.75m=7.5dm(分米)