Problem-Solving and Data AnalysisHardConverting a running speed to kilometres per hour
Problem-Solving and Data Analysis practice question
A runner covers 400 metres in 80 seconds. What is the runner's average speed in kilometres per hour?
Answer: 18
400/80 = 5 metres per second, and 5 × 3,600/1,000 = 18 km/h.
Common wrong answers
- If you answered 5
- 5 is the speed in metres per second.
- If you answered 300
- 300 is metres per minute.
- If you answered 1.8
- 1.8 misplaces the decimal in the conversion.
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