It depends on what you mean by hanging. Some people say hanging then mean fit hinges, fit locks, bore holes, fit all the furniture, plane to size.
If it simple is just to hang the door then really this should take a very short time and should cost no more than £50.
f it is to do all of the above, then this is a time cosuming job and depends whether the carpenter is on a day, hour of job rate.
However you should be charged around about £50 per door. However this price can differ depending on the door itself, the area you are in and the timescale you need it done.
A normal carpenter day rate depening on the above will be between £80 - £170 per day (highest being one of the best). Lowest being a polish guy or something.
Hour rate between £10 - 26.
Hope this helps.
Source -
Husband a carpenter of 10 Years.