individual age

[srm@accessin.com.au]

Hi, I am a bit of a lay person reagarding dinosauia, but i read a lot and
the one thing that seems to be missing from all the literature is this:

what age did individuals reach?
are they like their reptillian brothers and reach great ages of 80+ years,
and how long did it take for them to reach maturity, and then  to what age
did they live?
I realise that this information cannot be gained from the fossils, but
perhaps some of you could have an educated guess. 
"listen to the wise man......."