[O] How to put times into tables

[Marcin Borkowski]

Hi list,

I'm preparing a scenario of an event, and I'd like to have a table like
this:

|  Time |  Duration | What happens |
|       | (minutes) |              |
|-------+-----------+--------------|
| 10:00 |        10 | ...          |
| 10:10 |         2 |              |
| 10:12 |         5 |              |
| 10:17 |           |              | 

Is it possible to devise some smart formula to put into column one, so
that I only have to fill in the "Duration" column?  I skimmed through
the Calc manual, but didn't found much about displaying HMS forms
/without seconds/.

TIA,  

-- 
Marcin Borkowski
http://octd.wmi.amu.edu.pl/en/Marcin_Borkowski
Adam Mickiewicz University