Problem-Solving and Data AnalysisVery hardConverting a speed across two units
Problem-Solving and Data Analysis practice question
A train travels at 54 kilometres per hour. What is its speed in metres per second? (1 kilometre = 1,000 metres)
Answer: 15
54 km/h = 54,000 m per 3,600 s = 15 m/s.
Common wrong answers
- If you answered 900
- 900 divides by 60 once; an hour is 3,600 seconds, not 60.
- If you answered 54000
- 54,000 is metres per hour; the seconds conversion is missing.
- If you answered 0.015
- 0.015 divides the wrong way round.
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