How long did it take for the twin towers to fall?

found ;
how long did take twin towers collapse?
in: history, new york city, september 11 attacks [edit categories]
answer:
south tower collapsed 56 minutes after being hit, , north tower 102 minutes after being hit. once buildings began fall, each took less 30 seconds collapse. south tower, though hit second, collapsed first.

parts of south tower reached ground 9 seconds after collapse began @ 9:59 edt, approximately 56 minutes after being hit. central core of lower 40 floors caved in within 25 seconds thereafter. debris flattened or filled 7 basement levels within few seconds.

tv mast , roof north tower struck ground 11 seconds after descent began, @ 10:28 edt, 102 minutes after being hit. central core of lower 60 floors collapsed within 10 15 seconds after being bypassed falling upper floors.

of interior collapse hidden dust , debris, spread on surrounding buildings , streets.




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does know how long took twin towers fall? first tower struck second tower hit ground?

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