24-hour time is simple, beta — 9:20 am is 09:20, and 1:05 pm becomes 13:05. From 09:20 to 13:05 is 3 hours and 45 minutes. But in real life, I always add ten minutes more when calculating my daughter's tuition pickup... because her teacher, *hai Bhagwan*, always keeps her late for "just one more sum!
#exams#study
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