一块棱长0.9m的正方体钢坯体积=0.9^3造成一块长9m,宽3m的钢板,钢板厚=0.9^3/(9*3)=0.027M=2.7CM
正方体体积:0.9m=9dm 9*9*9=729dm³钢板厚度:9m=90dm 3m=30dm 729/90/30=0.27dm 0.27dm=2.7cm
2.7cm