83 Communiquer en anglais Calculer-Communiquer A hockey game is divided into three 20-minutes periods of actual playing time with two intermis- sions of a quarter of an hour to flood the ice between these periods. A hockey game started at 6:30 pm and ended at 9 pm. Write down the fraction of the game's total duration representing : a. the actual playing time; b. the intermissions.
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Bonjour
The game started at 6:30 pm and ended at 9:00 pm.
So the total duration of the game = End time - Start time = 9:00 pm - 6:30 pm = 2:30
Converted in minutes the total duration is 150 minutes
a)
Each period of actual playing time is 20 minutes, and there are 3 periods.
So Actual playing time = 20 minutes/period * 3 periods = 60 minutes
Fraction of the game's total duration representing the actual playing time:
[tex]\dfrac{60}{150} =\dfrac{30\times 2}{30\times 5} =\dfrac{2}{5}[/tex]
b. )
The intermissions occur between the periods. Since there are two intermissions of a quarter of an hour each, the total intermission time is 30 minutes
Fraction of the game's total duration representing the intermissions:
[tex]\dfrac{30}{150} =\dfrac{30\times 1}{30\times 5} =\dfrac{1}{5}[/tex]