A vehicle travels at 90 km/h. What is its speed in metres per second?

Correct answer: B. 25 m/s

Multiply km/h by 1,000/3,600, which simplifies to 5/18: 90 × 5/18 = 25 m/s. To go from m/s back to km/h, multiply by 18/5.

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Answer and explanation

The correct answer is B. 25 m/s

Multiply km/h by 1,000/3,600, which simplifies to 5/18: 90 × 5/18 = 25 m/s. To go from m/s back to km/h, multiply by 18/5.