Total volume = Length × Breadth × Height.

• Total volume = 100 × 45 × 60
• 100 × 45 = 4500
• 4500 × 60 = 270000 cm³
• Volume of oil = \(\frac{81}{100}\) × 270000
• 270000 ÷ 100 = 2700; 81 × 2700 = 218700 cm³
• 218700 ÷ 1000 = 218.7 l

Final Answer: 218.7 l