Question

why are manhole covers round?​

Answer 1

Answer:

Manhole covers are round as the reason is that a round manhole covers cannot fall through its circular openings.

Round tubes are the strongest and most material efficient shape against the compression of the earth around them.

Answer 2

Answer:

here is your answer dear:-

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.

hope it's help you ✌️