V冰=m冰/ρ冰=900/0.9=1000dm^3 =1m^3 (ρ冰=0.9kg/dm^3)
m水=m冰
V水=m水/ρ水=900/1=900dm^3=0.9m^3 (ρ水=1kg/dm^3)
V冰-V水=100dm^3=0.1m^3(这是结果)