Eleven hours
The time from 5:30 AM to 8:30 PM is 15 hours. You can calculate this by counting the hours from 5:30 AM to 5:30 PM, which is 12 hours, and then adding an additional 3 hours to reach 8:30 PM.
fourteen and a half20:00 - 05:30 = 14:300:30 + 6:00 + 8:00 = 14:30
From 5:30 AM to 4:00 PM is a total of 10 hours and 30 minutes. This can be calculated by counting the hours from 5:30 AM to 4:00 PM. Specifically, that's 10 hours from 5:30 AM to 3:30 PM, plus an additional 30 minutes to reach 4:00 PM.
From 8:30 AM to 5:00 PM is a total of 8 hours and 30 minutes. This can be calculated by counting the hours from 8:30 AM to 5:00 PM, which is 8 hours, plus the additional 30 minutes.
The time from 7:30 to 5:30 is 10 hours. This is calculated by counting the hours from 7:30 AM to 5:30 PM.
The time from 5:30 AM to 8:30 PM is 15 hours. You can calculate this by counting the hours from 5:30 AM to 5:30 PM, which is 12 hours, and then adding an additional 3 hours to reach 8:30 PM.
5 hours and 30 minutes.
fourteen and a half20:00 - 05:30 = 14:300:30 + 6:00 + 8:00 = 14:30
The time 6 hours after 5:30 pm will be 11:30 pm.
From 5:30 AM to 4:00 PM is a total of 10 hours and 30 minutes. This can be calculated by counting the hours from 5:30 AM to 4:00 PM. Specifically, that's 10 hours from 5:30 AM to 3:30 PM, plus an additional 30 minutes to reach 4:00 PM.
From 8:30 AM to 5:00 PM is a total of 8 hours and 30 minutes. This can be calculated by counting the hours from 8:30 AM to 5:00 PM, which is 8 hours, plus the additional 30 minutes.
Round 7:30 am up to 8 am. 8am = 0800 and 5 pm = 1700 so from 8 am to 5 pm, it is 9 hours. There are thirty minutes left from 7:30 am to 8 am so there are 9.5 hours from 7:30 am to 5 pm.
The duration between 3:30 pm and 9:15 pm is 5 hours and 45 minutes.
8 and 5/6 hours
9 am to 12 pm: 3 hours 12 pm to 2:30 pm: 2 1/2 hours 3 + 2 1/2 = 5 1/2 hours. So there are 5 1/2 hours between 9 am and 2:30 pm.
The time from 7:30 to 5:30 is 10 hours. This is calculated by counting the hours from 7:30 AM to 5:30 PM.
1 pm to 5:30 pm is a period of 4 hours 30 minutes.