A car moves at 72 km/h. What is its speed in metres per second?
Answer and explanation
Correct answer: B. 20 m/s
- Step 1: Multiply by . Step 2. m/s. Answer: 20 m/s. Why not the others: 72 m/s forgets the conversion, 40 m/s doubles and 250 m/s divides by the wrong factor.
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