Question 21
Ratio, Percentages and RatesThe average speed of a car is 63 km/h. Express the speed in ms−1.
- A.35.5 ms−1
- B.17.5 ms−1
- C.30.0 ms−1
- D.15.0 ms−1
Show the answer and explanation
Answer: B (17.5 ms−1)
Explanation
63 km/h = 63 000 m ÷ 3600 s = 17.5 m/s.