Problem-Solving and Data AnalysisMediumDistance from a fuel rate
Problem-Solving and Data Analysis practice question
A car travels 240 kilometres on 15 litres of fuel. At the same rate, how many kilometres can it travel on 25 litres?
Answer: 400
The rate is 240 / 15 = 16 kilometres per litre. On 25 litres: 16 × 25 = 400.
Common wrong answers
- If you answered 16
- 16 is the rate in kilometres per litre, not the distance for 25 litres.
- If you answered 144
- 144 is 240 × 15 / 25, scaling the wrong way. More fuel means MORE distance.
- If you answered 250
- 250 is 240 + 10 — adding the extra litres to the distance. Distance scales by the RATE: 16 km per litre.
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