There are 60 minutes in an hour and since "half an hour" is half of an hour, it will contain 30 minutes.
Simply divide 60 by 2 to get the answer.
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There are 3,600 seconds in an hour.
There are 3600 seconds in an hour, so in 1 hour the light will flash 600 times.
200 meters in 36 seconds is equivalent to a speed of approximately 18.18 miles per hour.
8.726 miles per hour.
A quarter of an hour after 11:25 is 11:40.