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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.

Q: Why is it better for manhole covers to be round rather than square?

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69.57 yards

A square yard covers, well, one square yard of ground. One could also say it covers nine square feet, or 1,296 square inches. A square yard is a measurement of area. It is not a measurement of the actual surface.

Skin usually covers about 2 square meters.

260,000 square feet CORRECT!

That depends on how thin you spread it. If it's a meter thick, it only covers one square meter. If it's a centimeter thick, it covers a hundred square meters.

Related questions

The round manhole cannot fall into the hole no matter which way you turn it.

Round manhole covers are generally used over square manholes because they cannot fall through the manhole openings. There is a chance that if square manhole covers are used they can be turned at an angle and fall through the manhole opening. Round manhole covers can be moved more easily as well.

A round manhole cover will not fall through the hole, A square one will.

Microsoft and Burger King came to the conclusion that the covers are round after a year long study. At the end of this study they concluded that, logically, man hole covers must be round, otherwise the fat people that use their products would fall in, and thus would cause their profits to drop considerabliy.

4 times 17 is 68

So it doesnt fall in, theres no way for a circle to fall into the hole, whereas a square manhole, when tilted at the right angle, could fall in and hurt the workers underneath.

Spain covers 195,124 square miles.

A square one would fall through itself but with a round one this is impossible

The length of the sides of a square if it covers 222 square yards is: 14.9 yards.

Asia's land covers about 17,176,102 square miles. :)

It covers 3,794,066 square miles, or 9,826,630 square kilometers. 6.76% of which is water.

The size of constellation is measured in terms of the area - in square degrees - which the constellation covers. They range in size from Crux which covers 68 square degrees (0.05% of the sky) to Hydra, which covers 1300 square degrees (1.0%).