A car covers 900 m in 45 seconds. What is its speed in km/h?
Correct answer C. 72 km/h
Explanation
Speed = distance / time = 900 / 45 = 20 m/s. Converting to km/h by multiplying by 18/5 gives 20 × 18/5 = 72 km/h.
Answer checked How we write and check questions
Discussion