What is the current time?
What time is the show?
The event will start at 7:30 PM
When will we arrive at the airport/train station/museum etc.?
Is there a specific time we should meet?
When will she arrive?
My class starts at 11:00 AM.
My class is from 8:00 AM to 2:00 PM
Our drive time will be two (2) hours and thirty (30) minutes. Using words or numbers is correct.
Medical appointments are often set up in twenty-minute intervals. The appoint with Dr. Jones will be at 10:20 AM or; The appointment with Dr. Jones will be at 2:40 PM.
Classes in schools often start or end at 50 minutes into the hour (example 8:50) or stated another way class will end ten minutes before the hour.
There is sixty minutes in one hour, 15 minutes represents a quarter of an hour, 60 seconds is one minute.
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