The prices of flour of Brand A and Brand B are $28/400 g and $44/550 g respectively. Find the prices of flour of the 2 brands/ kg.

To find the price of flour per kilogram for both Brand A and Brand B, we will convert the given prices to a 1 kg basis.

### For Brand A:
The price is $28 for 400 grams.

To find the price per kilogram, first, we need to determine how many times 400 grams go into 1 kilogram (1000 grams):

\[
\frac{1000 \, \text{g}}{400 \, \text{g}} = 2.5
\]

Now, multiply the price by 2.5 to get the price per kilogram:

\[
28 \times 2.5 = 70
\]

Thus, the price of Brand A's flour is **$70 per kg**.

### For Brand B:
The price is $44 for 550 grams.

To find the price per kilogram, determine how many times 550 grams go into 1 kilogram:

\[
\frac{1000 \, \text{g}}{550 \, \text{g}} \approx 1.818
\]

Now, multiply the price by approximately 1.818 to get the price per kilogram:

\[
44 \times 1.818 \approx 80
\]

Thus, the price of Brand B's flour is **$80 per kg**.

### Final Answer:
- Brand A: **$70 per kg**
- Brand B: **$80 per kg**

Would you like further details or have any other questions? Here are some related questions:

1. How do we convert grams to kilograms in other scenarios?
2. What if Brand A offered a discount—how would it affect the price per kg?
3. How can we compare costs if the weight was given in pounds instead of grams?
4. What if we wanted to find the cost for a specific amount of flour (e.g., 750g)?
5. How would inflation affect flour prices over time?

**Tip**: When comparing products sold in different quantities, always standardize them to the same unit (like per kg or per liter) to make a fair comparison.

Learn how to calculate the price per kilogram for flour from Brand A and Brand B, given prices for 400 g and 550 g respectively. This problem covers key concepts in unit conversion and proportions, with a step-by-step solution suitable for students in Grades 5-7.

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