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DcSensai Icon-twitter @DcSensai

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5ab01e8e-12d2-4c7f-aa96-5adaa15195c4_normal @DcSensai

they are shaped like that to prevent the cover from falling down the hole itself.

3:26PM Mon, November 08 2010

In reply to: " Does anyone know why manholes are circles and not squares? #hijackedtweet " -Asked by @grindhousebarbi

3

5ab01e8e-12d2-4c7f-aa96-5adaa15195c4_normal @DcSensai

yes because unlike squares, a circle can not fall in itself.

3:36PM Mon, November 08 2010

In reply to: " Does anyone know why manholes are circles and not squares? #hijackedtweet " -Asked by @grindhousebarbi

3