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John and Paul begin work at 8:00 in the morning and finish at 4:30 in the afternoon. John begins his first break of the day at 8:45 and his second break at 9:30, and he continues to take a break every 45 minutes throughout the day. Paul begins his first break at 9:00 and his second break at 10:00, and he continues to take a break every 60 minutes throughout the day. At which of the following times do John and Paul begin a break at the same time?
Indicate all such times.
Indicate all such times.
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以上解析由 考满分老师提供。
