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WAEC Mathematics 2000 Question 12

Question 12

Ratio, Percentages and Rates

A car moves at an average speed of 30kmh−1, how long does it take to cover 200 metres?

  1. A.2.4 sec
  2. B.24 sec
  3. C.144 sec
  4. D.240 sec.
Show the answer and explanation

Answer: B (24 sec)

Explanation

30 km/h = 30000 m ÷ 3600 s = 25/3 m/s. Time = 200 ÷ 25/3 = 24 seconds.