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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.

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13y ago

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A circular manhole cover is used because it cannot fall into the hole it covers regardless of its rotation. This design simplifies installation and removal of the cover, reduces the risk of accidents, and is more cost-effective to manufacture.

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11mo ago
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Q: Why manhole is a circle when physics is applied?
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