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GeneralRe: 17 Former Google interview questions so ridiculous the company banned them Pin
Kent Sharkey9-Jul-14 14:08
memberKent Sharkey9-Jul-14 14:08 
GeneralRe: 17 Former Google interview questions so ridiculous the company banned them Pin
ahmed zahmed9-Jul-14 17:18
memberahmed zahmed9-Jul-14 17:18 
GeneralRe: 17 Former Google interview questions so ridiculous the company banned them Pin
Karen Mitchelle9-Jul-14 17:50
professionalKaren Mitchelle9-Jul-14 17:50 
GeneralRe: 17 Former Google interview questions so ridiculous the company banned them Pin
Duncan Edwards Jones10-Jul-14 0:43
professionalDuncan Edwards Jones10-Jul-14 0:43 
There are so many answers to this question and the one the "interviewer" was probably expecting is the only wrong one - actually a circle is the only shape that can fall into the hole no matter what orientation it is in and this would happen if the manhole didn't have a lip.

Real reasons:
1) Cast iron is really expensive so the less of it you use the better - a round cover uses less metal than any other shape.
2) Cast iron is really expensive - per above
3) Cast iron is really heavy - a shape you can roll is easier to transport
4) Manholes are round because cylinders are stronger than cubes under compression and humans are broadly speaking cylindrical when going up/down a ladder.
5) Tradition/change impedance - there are so many existing round manholes that any attempt to introduce a different shape faces impossible odds
GeneralRe: 17 Former Google interview questions so ridiculous the company banned them Pin
Dan Neely10-Jul-14 3:55
memberDan Neely10-Jul-14 3:55 
GeneralRe: 17 Former Google interview questions so ridiculous the company banned them Pin
Kent Sharkey10-Jul-14 5:49
memberKent Sharkey10-Jul-14 5:49 
NewsHello Windows Pin
Kent Sharkey9-Jul-14 8:50
memberKent Sharkey9-Jul-14 8:50 
GeneralRe: Hello Windows [modified] Pin
PIEBALDconsult9-Jul-14 9:15
memberPIEBALDconsult9-Jul-14 9:15 
GeneralRe: Hello Windows Pin
Kent Sharkey9-Jul-14 9:23
memberKent Sharkey9-Jul-14 9:23 
GeneralRe: Hello Windows Pin
Rob Grainger10-Jul-14 2:37
memberRob Grainger10-Jul-14 2:37 

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