The volume of the cuboid equals the volume of the cube.<br><br>Volume of cube = 28&sup3; = 21952 cm&sup3;.<br>Volume of cuboid = 28 × w × 14 = 392w.<br><br>392w = 21952<br>w = 21952 ÷ 392 = 56 cm.<br><br>Final Answer: 56 cm