What is 72 km/h in metres per second?

Correct answer: B. 20 m/s

Multiply by 1,000 to get metres and divide by 3,600 to get seconds: 72 × 1,000 ÷ 3,600 = 20 m/s. A shortcut is to multiply km/h by 5/18.

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Answer and explanation

The correct answer is B. 20 m/s

Multiply by 1,000 to get metres and divide by 3,600 to get seconds: 72 × 1,000 ÷ 3,600 = 20 m/s. A shortcut is to multiply km/h by 5/18.