Total volume = Length × Breadth × Height. Empty = 100% − 60% = 40%.<br><br>&bull; Total volume = 60 × 40 × 25 = 60000 cm&sup3;<br>&bull; 60000 cm&sup3; = 60 l (since 1 l = 1000 cm&sup3;)<br>&bull; Empty space = 40% of 60 l = 0.4 × 60 = 24 l<br><br>Final Answer: A: 24 l