How long are the classes? -variation

[Steve]

No: HPFGUIDX 79707

--- In HPforGrownups at yahoogroups.com, "michaelkgidlow"
<Veritas771 at h...> wrote:
> I always assumed a standard class was 45 minutes, but in book 5
> , both a single period and a dubble period are refered to as being 
> one and a half hours long. What's up with this?

bboy_mn:

Having read the other posts, it seems your question has been answered,
and I agree, 'double' to me has always meant double length.

But I pose another variation of your question. If a single class, is
45 minutes with 15 minutes to get to the next class, then would a
double be 45x2=1hr 30 min. with a half hour (15x2) between classes, or
would a double be 1hr 45 minutes leaving the standard 15 minutes
between class? The double class would end at 15 minutes to the hour
just like all the other classes. 

I would think that all classes whether double or single would end at
15 minutes to the top of the hour. But then I remember
Harry/Ron/Hermione periodically going out into the courtyard between
classes. Is this for the long 1/2hr gap at the end of a double class,
or is this just full class period during which they have no class. I
didn't get the impression when I read it that is was as long as a full
class period. 

So basically, I'm lost. Any help?

bboy_mn