Why Are Manholes And Their Covers Round - JUST WHY
Channel: Just Why
Date: 2019-11-17

If you look down at the road you may see circular lids on the middle of the road, so why are manholes round, 

If this question hunted you for a while then here is the answer, manholes and their covers are round because the opening doesn't let the lid fall of through it. 

If it were any other shape like a rectangle or a square then when placed diagonally, it will easily silde through which can be a pain in the rare to get it back again

Other reason why a manhole and its cover is a circle is because it reduces the manufacturing cost since there are less edges and corners to work on, here a simple circle is much easier to work with rather than a square or rectangle since they dont have to worry about the edges and angles of the shape so that it can fir precisely. 

Well there are many more reasons to cover, head over and click on that play button to know more. 

Thanks for watching!