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Homework Help: How to find distance given echo time. (WAVES)

  1. Oct 18, 2011 #1
    1. The problem statement, all variables and given/known data
    A ship is 220metres from a large cliff when it sounds its foghorn. If the echo time is 0.5s, how far is the ship from the cliff?

    2. Relevant equations

    Echo time= 0.5s

    3. The attempt at a solution
    220*0.5= 110 m

    I really don't know.. Help please
  2. jcsd
  3. Oct 18, 2011 #2


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    Staff Emeritus
    Science Advisor
    Homework Helper

    Read the problem statement very carefully.
  4. Oct 18, 2011 #3

    so the distance would still be 220m since it's an echo? No working out to do?
  5. Oct 18, 2011 #4


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    Gold Member

    This can't be right. It's a trick question.

    Is this the entire question, as written, in your book?
  6. Oct 18, 2011 #5
    Yes this is how it was given.
  7. Oct 18, 2011 #6
    Well, the answer is clearly 220 meters :D. This one made me laugh
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