Final answer:
The game ended at 19:32 (7:32 PM) after adding together all quarters and the halftime duration to the starting time.
Step-by-step explanation:
To calculate the end time of the game that started at 18:30, we must first add up the total duration of playing time and halftime. There are four eight-minute quarters, which means the total playing time is 4 quarters × 8 minutes per quarter = 32 minutes. Halftime lasted for 30 minutes. Therefore, the total time to be added to the starting time is 32 minutes of play plus 30 minutes of halftime, which equals 62 minutes.
Now, we need to add the 62 minutes to the starting time of 18:30. To do this, we can convert the starting time to minutes past 18:00, which is 30 minutes, and then add the additional 62 minutes.
30 minutes (start time past 18:00) + 62 minutes (game and halftime duration) = 92 minutes past 18:00. To find the final time, we divide 92 by 60, which gives us 1 hour and 32 minutes past 18:00. Adding this to 18:00, the game ended at 19:32 or 7:32 PM.