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Measuring Elapsed Time - Cycle 2
| Mathematics
What is the Duration of an Event?
The duration of an event is the time elapsed from its start to its finish.
Example:
I’m on the plane between 11 a.m. and 3 p.m. My flight has a duration of 4 hours.
How to Measure the Duration of an Event Using a Clock?
To measure the duration of an event, look at the hour hand. When the hour hand makes a full turn around the clock, it means 60 minutes (1 hour) have elapsed.
The minute hand moves as the hour hand advances. Therefore, the minutes hand can also be used to help measure the hours.
To remember how a clock works, see the concept sheet Telling the Time on a Clock.
How long is my badminton lesson if it starts at 6:15 a.m. and ends at 7:45 a.m.?
| From 6:15 a.m. to 7:15 a.m., the hour hand makes a full turn around the clock. Therefore, one hour has elapsed. |  |
| From 7:15 a.m. to 7:45 a.m. the hour hand moves ahead 30 minutes. |  |
The duration of my course is 1 hour and 30 minutes.
