1. **Stating the problem:** A poultry farmer has 6 lorries, each loaded with 220 crates of eggs weekly. Each crate contains 30 eggs. We need to find the total eggs sold in: a) 4 months b) 2 years c) 5 1/2 trillion weeks 2. **Formula and explanation:** - Eggs per lorry per week = crates per lorry \( \times \) eggs per crate = $220 \times 30$ - Total eggs per week = eggs per lorry per week \( \times \) number of lorries = $220 \times 30 \times 6$ - Total eggs in given weeks = total eggs per week \( \times \) number of weeks 3. **Calculate eggs per week:** $$220 \times 30 = 6600$$ $$6600 \times 6 = 39600$$ So, 39600 eggs are sold per week. 4. **Convert time to weeks:** - 1 month = 4 weeks (approximate) - 1 year = 52 weeks 5. **Calculate for each case:** a) 4 months = $4 \times 4 = 16$ weeks Total eggs = $39600 \times 16 = 633600$ b) 2 years = $2 \times 52 = 104$ weeks Total eggs = $39600 \times 104 = 4118400$ c) 5 1/2 trillion weeks = $5.5 \times 10^{12}$ weeks Total eggs = $39600 \times 5.5 \times 10^{12} = 2.178 \times 10^{17}$ eggs **Final answers:** a) 633600 eggs b) 4118400 eggs c) $2.178 \times 10^{17}$ eggs