## 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

1. didnt get which distance is 3?

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

3. ok.thanks....

4. 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.

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

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