Preference

Question: A train 360 m long is running at a speed of 45 km/hour. In what time will pass a bridge 140 m long?

  1. a.
    40 seconds
  2. b.
    42 seconds
  3. c.
    45 seconds
  4. d.
    48 seconds
Answer: a

Question: If a plane can travel P miles in Q hours, how long will it take to travel R miles?

  1. a.
    PQ/R hours
  2. b.
    P/QR hours
  3. c.
    PR/Q hours
  4. d.
    QR/P hours
  5. e.
    Q/PR hours
Answer: d

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