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Example 2: Convert the following time into 12-hour clock time.

(a) 0123 hours (b) 1540 hours (c) 0315 hours
Solution: (a) 0123 hours = 1:23 a.m. (b) 1540 hours = 3:40 p.m.
(c) 0315 hours = 3:15 a.m.

Exercise 9.6

1. Complete the table given below:

12-hour 24-hour 12-hour 24-hour
clock time clock time clock time clock time
(a) 1 a.m. (f) 11:55 p.m.

(b) 12 mid-night (g) 12 noon
(c) 11:15 a.m. (h) 3:35 p.m.

(d) 2:23 a.m. (i) 7:10 a.m.
(e) 6:45 a.m. (j) 5:40 p.m.

2. How long is it between these times?
(a) 0815 hours and 1550 hours. (b) 1540 hours and 1700 hours

3. Read the given time table of a train and answer the following questions using a.m. or p.m.
Station Time table

A arrival : 1550
departure : 1610

B arrival : 1830

departure : 1840
C arrival : 2200

departure : 2215
D arrival : 0945
departure : 1000

(a) When does the train leave station A? ___ a.m./p.m.

(b) When does the train arrive at station C? ___ a.m./p.m.
(c) When does the train leave station C? ___ a.m./p.m.
(d) When does the train arrive at station D? ___ a.m./p.m.

4. Dipti’s flight arrives at 2235 hours at the airport. What time of the day is
it? Express in a.m. or p.m.

5. Harshita goes to play at 1830 hours and comes back at 7:50 p.m. For how
many hours and minutes does she play?