If cost of a packet of milk is 10 for 270ml what is its per litre cost.

To find the cost per litre of the milk, you can use the following steps:

1. **Convert the volume to litres:**
   \[
1 \text{ litre} = 1000 \text{ ml}
\]
So, 270 ml is:
\[
\frac{270 \text{ ml}}{1000 \text{ ml/litre}} = 0.27 \text{ litres}
\]

2. **Calculate the cost per litre:**
   If 270 ml costs 10 units of currency, the cost per litre (1000 ml) is:
   \[
\text{Cost per litre} = \frac{10}{0.27} \approx 37.04 \text{ units of currency}
\]

So, the cost per litre of the milk is approximately **37.04**.

Would you like more details or have any other questions?

Here are five related questions:
1. How do you calculate the cost per millilitre?
2. If the packet size changes to 500 ml, what would be the new per litre cost?
3. How does the price per litre change if the packet price increases to 12 units of currency?
4. What is the per litre cost if the volume of the packet is 1 litre?
5. How can you compare the cost efficiency of different packet sizes?

**Tip:** Always remember to convert units to a common base before performing any calculations involving rates or ratios.

Learn how to calculate the cost per litre of milk based on the cost of a 270ml packet. Understand unit conversion and ratio calculations to determine the per litre cost efficiently. Suitable for learners in Grades 5-6.

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