Question 8
MediumOriginal questionA train runs at 72 km/h. What is this speed in metres per second?
Show the answer and explanation
CorrectNot quiteAnswer B
Correct answer: B
Explanation
1 km/h = 1000 m ÷ 3600 s = 5⁄18 m/s.
72 × 5⁄18 = 20 m/s.
Worth noting
259.2 comes from multiplying by 3.6 instead of dividing; to go from km/h to m/s the number gets smaller.
- Concept
- Converting km/h to m/s
- Typical timeTypical
- 60 s
- Your timeYours
- —
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