I'll go with an alley of zero width.
best wishes,
dave belsley, w1euy
On Mar 30, 2005, at 3:22 PM, Dan Barker wrote:
I ran into a brain-teaser once, that had me baffled for hours (I won't
say
how many). Finally, I called my sister, the Rocket Scientist
("actually,
we're not _Rocket_ scientists" - That's a quote from her husband) and
asked
her.
She and Paul spent a few minutes on the problem, figured it out, but
it was
such a trivial answer they threw it away. Since I'd spent so long on
the
Question, I gave her about a week and then I called back. Luckily
they'd not
taken out the trash, so she easily found their notes and read them to
me.
I won't spoil it for you 'crafters.
Dan / WG4S / K2 #2456
Problem: An alley has a 20-foot ladder across it, in the left lower
corner
and leaning on the right wall. There also is a 30-foot ladder, from the
right lower corner leaning on the left wall. The laders cross at 10
feet
high.
How wide is the alley?
Usual conventions: alley is all right angles, ladders have no
thickness nor
bends, blah blah blah...
This should make some juices flow out there. Just simple geometry, or
is it?
PS: Iteration is cheating. Sorry Issac.
<snip>
the responses would be far more interesting than merely "looking up"
the
answer
</snip>
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