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Discussion in 'Bad Dog Cafe' started by Stringbanger, Jan 27, 2016.
Because the man holes are round?
nope, let me rephrase it... Why are man holes and their covers round?
Some engineers can't answer this one...
A cowboy rides into town on Friday, stays for three days and leaves on Friday. How did he do it?
He rides a horse named Friday?
Why are manhole covers round?
So the covers can't fall through the opening.
I love this riddle-joke. You don't have to say it with a Yiddish accent, but it doesn't hoyt.
Man: What's green, hangs on the wall, and whistles?
Boy: What's green, hangs on the wall, and whistles? I give up!
Man: A herring!
Boy: A herring? A herring isn't green.
Man: Paint it already.
Boy: A herring doesn't hang from the wall.
Man: So nail it there.
Boy: Okay, I paint the herring. I nail it to the wail, but there's no way it's going to whistle.
Man: I put that in so it wasn't too easy.
This is true. In fact when I used to work in Houston there were a few manhole covers that were pre-1920s that were rectangular. We had to be careful removing and replacing them for the fact that it was fairly easy for them to slip around and fall into the opening.
This!!! It is the only shape that won't allow the the top to fall through the opening...
What about an equilateral triangle?
Nope. You can find a way to get a triangle through the circle. It is apparently only the circle that won't allow itself to go through a hole of the same size.
I don't know why. But I bet someone round here does.
I was thinking about it and you're right. Take the triangle cover and send it down the triangle hole, point first. it will get stuck when you get to its wide end. At that point you tilt it so that one back point (then the other) go through, instead of trying to pass through the hole at the same time.
That's more like it. Correct!
Actually, the equilateral triangle will not fall into the hole, but there is a secondary reason for the round hole and it comes into play here. That is the ease of removal and replacement. A round cover pops out generally by sliding out smoothly, and when you replace it you get it started and it slides in place without having to ever worry about alignment. A triangle would require re-positioning each time you wanted to replace it.
also a round manhole cover is often wedge shaped on the side,, the top is bigger that the bottom....or there is a lip on the hole edges for it to sit on..... so it can't fit through the hole.....
There you are. Thanks!
The "morning" is before the child can walk, so it crawls.
The "day" is growing up and into adult life.
The "night" is old age when it walks with the aid of a stick.
snail in the well
You have a well that's 20 feet deep.
At the bottom of the well is a snail.
Everyday the snail climbs 3 feet, and at the end of the day he drops back 2, because of the dew.
How many days does it take the snail, to get out of the well.
18 days... no but good try