Monday, February 22, 2010

Fox 252

All along the wall, between us
I see a teacher, there for us
I look at the wall, I see right through it
I lean on the wall, there for us

6 comments:

  1. didnt get which distance is 3?

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  2. The distance between the point the top brick touches to the wall, and the top-right corner of the bottom-brick is 3.

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  3. i dont know how to draw the figure.

    but i m posting my solution...

    i will try to explain the figure

    let width=a
    length=b

    3 triangles which are formed.

    triangle ABC

    AB=sqrt(a^2-1)
    AC=a
    BC=1

    triangle PCD

    PC=b
    CD=b-1
    PD=3

    triangle PEF

    PE=sqrt(a^2-1)
    PF=a
    FE=1

    triangles ABC and PEF are congruent
    triangles ABC and PCD are similar.

    AB/CD=AC/CP=BC/DP

    sqrt(a^2-1)/(b-1)=a/b=1/3

    solving....

    we get

    a=5/3
    sqrt(a^2-1)=4/3

    so

    h=5/3+3+4/3=6

    option 1 is correct.

    ReplyDelete
  4. Looks correct. If you send us your figure, we can try to find a way to post it. Thank you.

    ReplyDelete
  5. Thank you vinay. We received it and will process it in the following days. Great work!
    --------
    Vinay says:
    i have sent the answer with the fig to...
    have u received it?
    ....

    ReplyDelete