Edge of the Rubik's cube `=3 cm` Volume of Rubik's cube `=3^3cu.cm=27cu.cm` Let the edge of each identical cube be 'a' cm. Number of identical cubes `=27` Volume of each identical cube `=a^3` `=("Volume of Rubik's cube)/("Number of identical cubes")=(27)/(27)=1` `a^3=1^3rArra=1`