Teaser Of The Day No. 300

[Carl]

Manhole covers are all made in a circular shape as opposed to a square because they have a commanding advantage.

What are the circular shaped covers preferred for ?


Answer will be provided next Thursday evening after 21:00.

[freddo]

Because as there are round they can not fall into the hole they cover

[Carl]

ANSWER

Unlike square or rectangular covers, circular covers run no risk of sliding through the hole diagonally. Circular manhole covers can
also be rolled for easy transport.