Question

ndwhy man holes are covered around?​

Answer 1

Answer:

You'd have to rotate the cover exactly the right way. Therefore, many manhole covers are round so they don't need to be rotated. There are no corners to deal with. Also, a round manhole cover won't fall into a hole because it was rotated the wrong way, so it's safer.

Answer 2

Answer:

Manholes are round because “it is the best shape to resist the compression of Earth around it.” Round shapes are easier to manufacture than square or rectangular shapes, and because manhole covers are heavy, being round makes them easier to move from place to place (just roll them!).

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