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WAEC Mathematics 1991 (August) Question 16

Question 16

Ratio, Percentages and Rates

A car is travelling at an average speed of 80km/hr. Its speed in metres per second (m/s) is

  1. A.13.3m/s
  2. B.22.2m/s
  3. C.133.3m/s
  4. D.222.2m/s
  5. E.1333.3m/s
Show the answer and explanation

Answer: B (22.2m/s)

Explanation

80km/h = 80 000m ÷ 3600s = 22.2m/s.