Find the original volume, then subtract the volume transferred to the cubical tank.<br><br>&bull; Original volume = 18 × 13 × 15<br>&bull; 18 × 13 = 234<br>&bull; 234 × 15 = 3510 cm&sup3;<br>&bull; Volume transferred = 8 × 8 × 8 = 512 cm&sup3;<br>&bull; Water left = 3510 − 512 = 2998 cm&sup3;<br><br>Final Answer: 2998