If cost of a packet of milk is 15 for 430ml what is it's per litre cost.

To find the cost per litre of milk, you need to scale up the cost for 430 ml to 1000 ml (1 litre).

### Step-by-Step Solution:

1. **Given:**  
   - Cost of 430 ml of milk = ₹15

2. **To Find:**  
   - Cost per litre (1000 ml)

3. **Calculation:**
   \[
   \text{Cost per litre} = \left(\frac{\text{Cost of 430 ml}}{\text{Volume in ml}}\right) \times \text{1000 ml}
   \]
   \[
   \text{Cost per litre} = \left(\frac{15}{430}\right) \times 1000
   \]
   \[
   \text{Cost per litre} = \frac{15000}{430} \approx 34.88
   \]

### Answer:
The cost per litre of milk is approximately **₹34.88**.

Would you like to explore more details or ask any questions?

Here are 5 related questions:
1. How would the per litre cost change if the price of 430 ml increases to ₹20?
2. How would you calculate the per litre cost if the volume provided was in litres instead of millilitres?
3. How can you convert other units, like gallons, to litres and calculate costs accordingly?
4. What would be the total cost for 3 litres of milk at this per litre rate?
5. How do you calculate the per litre cost if you are given the price for 2 litres?

**Tip:** When dealing with unit conversions, always ensure that you convert to the same base unit before performing calculations to avoid errors.

Learn how to calculate the cost per litre of milk when the price for 430 ml is ₹15. Detailed step-by-step solution provided, including unit conversion and cost calculation methods. Suitable for anyone looking to understand unit pricing calculations.

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