vingt-et-un heures et demie
Three thirty P.M. or three thirty in the afternoon or Fifteen thirty in military time.
Twelve thirty in the afternoon would be most correct. You cannot say twelve thirty o'clock. You only say o clock when you don't have any minutes over.
10½ hours
19h30 = written dix-neuf heures trente = spoken French times are like military time, with h (heures) put after the hour.
one hour and forty five minutes
9h30 -- unless you mean 9:30 pm, in which case it would be 21h30.
Three thirty P.M. or three thirty in the afternoon or Fifteen thirty in military time.
Twelve thirty in the afternoon would be most correct. You cannot say twelve thirty o'clock. You only say o clock when you don't have any minutes over.
10½ hours
3:30 PM or 15:30 (it depends really)
If you mean to write it out in letters and words then it's Four thirty pm.(Note that according to some styles, only numbers are used with AM and PM.)
Three thirty-six and thirty three seconds pm
The Dickâ??s Sporting Good usually operate between nine am and nine thirty pm from Monday to Saturday. They close on the holidays and on Sundays.
The time 4:30 PM is "four-thirty PM."
The total hours from 8 am to 3:30 pm is 7.5 hours.
one and a half hours
10 hours and 30 minutes.