Foundation November 2017 Paper 3 Q20
20 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. (3)
| Answer | Mark | Notes |
|---|---|---|
| New York (supported) | P1 | for changing between £ and $, eg \(1.089 \times 1.46\ (= 1.58(9.))\) or \(2.83 \div 1.46\ (= 1.93(8.))\) or between litres and gallons, eg \(1.089 \times 3.785\ (= 4.12(1.))\) or \(2.83 \div 3.785\ (= 0.74(7.))\) |
| P1 | for a complete process to give values that can be used for comparison, eg \(\text{``}1.938...\text{''} \div 3.785\ (= 0.51(2.))\) or \(\text{``}1.589...\text{''} \times 3.785\ (= 6.01(7.))\) or \(1.089 \times 3.785 = (4.12(1.))\) and \(2.83 \div 1.46\ (= 1.93(8.))\) | |
| C1 | for New York and correct comparative values. |