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Wednesday, May 28, 2008

Brain Teaser...

A car covers an outward journey at 70 mph. It returns over exactly the same distance in heavy traffic, at only 28 mph. What is the car's average speed over the entire journey?

3 comments:

  1. Anonymous7:45 am

    49?

    ReplyDelete
  2. Bryan9:44 am

    Is it 40, Bruce? bcb

    ReplyDelete
  3. surely 0mph - the return journey is in the opposite direction.
    Well that's it's average velocity...

    ReplyDelete