In Spain, Sam pays 2.7 euros for 18 litres of petrol - Edexcel - GCSE Maths - Question 8 - 2022 - Paper 2

Next, we convert the cost from euros to pounds:

Cost in pounds = ( 0.15 \text{ euros} \times 0.85 \text{ £/euro} = 0.1275 \text{ £ per litre} )

In Wales, the cost per litre can be found by first calculating the cost per gallon and then converting that to litres:

Cost per gallon in Wales = ( \frac{40.80 \text{ £}}{8 \text{ gallons}} = 5.10 \text{ £ per gallon} )

Converting gallons to litres: ( 1 \text{ gallon} = 4.5 \text{ litres} )

Cost per litre in Wales = ( \frac{5.10 \text{ £}}{4.5 \text{ litres}} \approx 1.1333 \text{ £ per litre} )

Now, we can compare the costs:

• Cost of petrol in Spain: ( 0.1275 \text{ £ per litre} )
• Cost of petrol in Wales: ( 1.1333 \text{ £ per litre} )

Since ( 0.1275 < 1.1333 ), petrol is indeed cheaper in Spain than in Wales. Therefore, Sam is correct.