We need to determine how much Lennox earns per kilogram of apples. Let's break it down step by step.

Step 1: Determine the total number of trips per week

Each truck makes 3 trips per week.

Step 2: Determine the total earnings per week

Lennox earns $300 per trip. The total earnings per week are given as:

$4500 \text{ dollars}$

Step 3: Determine the total number of packs delivered per week

Each trip delivers 50 packs of apples. The total number of packs per trip is:

$\text{Total packs per trip} = 50$

Since each truck makes 3 trips per week, the number of packs delivered by one truck per week is:

$3 \times 50 = 150 \text{ packs per truck per week}$

Step 4: Find the total kilograms of apples delivered

Each pack contains 12 kilograms of apples. So, the total kilograms of apples delivered per truck per week is:

$150 \times 12 = 1800 \text{ kg per truck per week}$

Step 5: Find how much Lennox earns per kilogram

We now divide the total earnings by the total kilograms of apples delivered:

$\frac{4500}{1800} = 2.5$

Thus, Lennox earns $2.50 per kilogram of apples.

Final Answer:

$\mathbf{2.50} \text{ dollars per kilogram}$

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Would you like a more detailed explanation or verification? Here are some related questions:

1. How many kilograms of apples does each truck deliver per trip?
2. If Lennox wanted to earn $6000 per week, how many more trips would need to be made?
3. What would be the total earnings if the price per kilogram increased to $3?
4. If each truck could carry 60 packs per trip instead of 50, how much would Lennox earn in a week?
5. How many kilograms of apples does Lennox sell in a month (4 weeks)?

Tip: Always double-check unit conversions to avoid mistakes in price calculations!