Correct Answer - Option 4 : 14:15
Calculation:
2:15 PM in 24 hour = 2:15 + 12 hours
⇒ 14:15
∴ The correct 24-hour clock expression of 2:15 P.M. is 14:15
Now let's understand with some other examples:
Concept:
Converting AM/PM to 24 Hour Clock
Add 12 to any hour after Noon (and subtract 12 for the first hour of the day):
For the first hour of the day (12 Midnight to 12:59 AM), subtract 12 Hours
Examples: 12 Midnight = 00:00, 12:35 AM = 00:35
From 1:00 AM to 12:59 PM, no change
Examples: 11:20 AM = 11:20, 12:30 PM = 12:30
From 1:00 PM to 11:59 PM, add 12 Hours
Examples: 4:45 PM = 16:45, 11:50 PM = 23:50
Converting 24 Hour Clock to AM/PM
For the first hour of the day (00:00 to 00:59), add 12 Hours, make it "AM"
Examples: 00:10 = 12:10 AM, 00:40 = 12:40 AM
From 01:00 to 11:59, just make it "AM"
Examples: 01:15 = 1:15 AM, 11:25 = 11:25 AM
From 12:00 to 12:59, just make it "PM"
Examples: 12:10 = 12:10 PM, 12:55 = 12:55 PM
From 13:00 to 23:59, subtract 12 Hours, make it "PM"
Examples: 14:55 = 2:55 PM, 23:30 = 11:30 PM
