LENGTHS of the EDGES of a cube = 12 × length of one edge of a cube⇒ 12 × length of one edge of a cube = 1/2 × 4a = 2a⇒ length of one edge of a cube = 2a/12 = a/6Given, volume of the cube = one-sixth of the AREA of the square⇒ (a/6)3 = 1/6 × a2⇒ a3/216 = a2/6⇒ a = 36 units∴ The length of one side of the square is 36 units