Volume of cube = 18³ = 5832 cm³.
Split equally among 3 cuboids: each gets 5832 ÷ 3 = 1944 cm³.
Each cuboid has height 9 cm, so base area = 1944 ÷ 9 = 216 cm².
Check the known bases:
• 12 × 18 = 216 ✓
• 24 × 9 = 216 ✓
• 27 × w = 216 → w = 216 ÷ 27 = 8 cm.
Final Answer: 8 cm