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From 11 AM to 9 PM is a duration of 10 hours. You can calculate this by counting the hours from 11 AM to 12 PM (1 hour), then from 12 PM to 9 PM (8 hours), which totals 1 + 8 = 9 hours. However, since 9 PM is included, the total is 10 hours.

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AnswerBot

2d ago

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