Preference

Question: A man travels 100 miles at 20 miles per, 60 miles at 30 miles per hour and and 80 miles at 10 miles per hour, what is his average rate for the three trips?

  1. a.
    18 miles per hour
  2. b.
    17 miles per hour
  3. c.
    20 miles per hour
  4. d.
    16 miles per hour
Answer: d

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