Question: A certain river has a current of 3 miles per hour. A boat takes twice as long to travel upstream between two points as it does to travel downstream between the same two points. What is the speed of the boat in still water?

  1. a.
    3 miles per hour
  2. b.
    6 miles per hour
  3. c.
    9 miles per hour
  4. d.
    12 miles per hour
  5. e.
    The speed cannot be determined from the given information.
Answer: c

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