Half-past eleven can also be written as 11:30 in a standard 12-hour clock format.
11:30
it means 11:05
Half of eleven and a half (11.5) is 5.75
30 minutes after the hour. "Its half past 1." it's 1:30!
30 minutes past the hour.
11:00 + 00:30 = 11:30 half past eleven
9:30
4:30
3:30
eleven and one half
five and a half inches