Why is a manhole cover round?
It is impossible to drop a round lid into a smaller round hole.
It is because round is the only shape that if turned or flipped over, it still retains the same length across its center. If you used a square, rectangle, triangle, hexagon or any other shaped lid, it could be rotated and fall into the hole.
This can't happen with the round shape.
And I have worked for the phone company for the last 22 years, yes it is a pain to get a rectangular lid that weighs 100 lbs, out of a 6 foot deep hole by yourself.
A round cover contains less metal than a same-sized cover of any other shape.
actually a round manhole cover isint the only shape that would work a reulux triangle would work too and square manholes would puncture tires
The reason that manhole covers are round, and not square, is because a square cover could, when placed at the right angle, fall through the square hole in the ground. A circle, however, is the same diameter no matter where you measure it, and it cannot fir through a hole the same size and shape, no matter how hard anyone tried.
It's so it never falls in the hole. The radius of the manhole cover is greater than the radius of the manhole. Therefore, it can never fall in. Any other shape (square, triangle, decagon, etc.) can fall in if manuvered to the correct angle. It's so it never falls in the hole. The radius of the manhole cover is greater than the radius of the manhole. Therefore, it can never fall in. Any other shape…
Go to the Manhole, which is marked by a large, red exclamation point. Examine it. Is the cover on, or off? If it is on, as it should be, click once, then again. If it is off, just click once. To get to the manhole, go to Varrock Circle, or the center of town. Find the fur trader's stall. Now, head north and est from there.