Typically hours of work exclude unpaid meal breaks. This may be different under particular awards however.
So if a person is required to work 38 hours per week, their total hours would be 38 paid hours plus the unpaid meal break(s).
In the case of your friend, if she has a 45 min unpaid meal break each day she would need to work from 9am until about 5.20pmin orderto work her fulll 38 hours per week.