Final answer:
To find which can of cooking oil gives the better value, calculate the cost per litre. The large can costs £0.54 per litre, while the small can costs £0.55 per litre, making the large can the better value.
Step-by-step explanation:
The student is trying to determine which size of can of cooking oil gives the better value for money. To figure this out, we need to calculate the cost per litre for each can and compare the two.
For the small can:
Cost per litre = £2.20 / 4 litres = £0.55 per litre
For the large can:
Cost per litre = £3.24 / 6 litres = £0.54 per litre
When we compare the cost per litre of each can, we find the large can costs £0.54 per litre, which is slightly less than the small can at £0.55 per litre. Hence, the large can offers the better value for money.