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\\November 23, 2023 10:50 AM Surender Prajapati Proof 5 Reader _________________________ Date: ___________________74

2. Convert the following 24-hour clock time into 12-hour clock time, a.m., p.m., noon
or midnight.
(a) 0320 hours (b) 0428 hours (c) 0937 hours (d) 1429 hours

(e) 1330 hours (f) 1740 hours (g) 1825 hours (h) 0000 hours
(i) 2222 hours (j) 2138 hours (k) 1348 hours (l) 2000 hours

3. Convert the following 12-hour clock time into 24-hour clock time.

(a) 1:40 a.m. (b) 4:57 a.m. (c) 12:06 a.m. (d) 6:05 a.m.
(e) 10:24 a.m. (f) 7:36 p.m. (g) 12:15 p.m. (h) 2:17 p.m.

(i) 11:00 p.m. (j) 12:00 midnight (k) 3:30 p.m. (l) 9:40 p.m.

COnvERsiOn Of TimE

The relationship between different units of time given below helps you for their conversion.

1 minute = 60 seconds 1 fortnight = 2 weeks = 14 days
1 hour = 60 minutes 1 year = 12 months

1 day = 24 hours 1 year = 365 days
1 week = 7 days 1 leap year = 366 days

Conversion of Higher Units into Lower Units

To convert higher units of time into lower units, we multiply.
example 1: Convert the following:

(a) 15 minutes into seconds (b) 8 minutes 52 seconds into seconds

(c) 2 hours 23 minutes 19 seconds into seconds
Solution:

(a) Since, 1 minute = 60 seconds

So, 15 minutes = (15 × 60) seconds = 900 seconds
(b) 8 minutes 52 seconds = 8 minutes + 52 seconds

= (8 × 60) seconds + 52 seconds

= 480 seconds + 52 seconds = 532 seconds

(c) 2 hours 23 minutes 19 seconds

= 2 hours + 23 minutes + 19 seconds
= (2 × 60) minutes + 23 minutes + 19 seconds

= (120 minutes + 23 minutes) + 19 seconds

= 143 minutes + 19 seconds = (143 × 60) seconds + 19 seconds

= 8580 seconds + 19 seconds = 8599 seconds

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