In London, 1 litre of petrol costs 108.9p In New York, 1 US gallon of petrol costs $2.83 1 US gallon = 3.785 litres £1 = $1.46 In which city is petrol better value for money, London or New York? You must show your working. - Edexcel - GCSE Maths - Question 2 - 2017 - Paper 3

First, determine the cost of one gallon of petrol in pounds, using the exchange rate:

Cost in pounds per gallon:

$2.83 / 1.46 \approx 1.936 \text{ pounds}$

Now, convert this to cost per litre:

Since 1 gallon = 3.785 litres:

$\frac{1.936}{3.785} \approx 0.511 \text{ pounds per litre}$

Now, we compare the costs per litre for both cities:

• London: £1.089 per litre
• New York: £0.511 per litre

Since $0.511 < 1.089$, petrol is better value in New York.