Question

If 1 litre cost £10.99 how much is the cost of 20 ml

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Fred

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Answer = To find the cost of 20 ml, we need to find the cost per milliliter and then multiply it by 20.
Given that 1 litre costs £10.99, we can find the cost per milliliter by dividing the total cost by the number of milliliters in a litre:
\[ \text{Cost per milliliter} = \frac{\text{Cost per litre}}{\text{Number of milliliters in a litre}} \]
\[ \text{Cost per milliliter} = \frac{£10.99}{1000 \text{ ml}} \]
\[ \text{Cost per milliliter} = £0.01099 \]
Now, to find the cost of 20 ml, we multiply the cost per milliliter by 20:
\[ \text{Cost of 20 ml} = £0.01099 \times 20 \]
\[ \text{Cost of 20 ml} = £0.2198 \]
So, the cost of 20 ml is £0.2198 or approximately £0.22.

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