Answer:
3 hours and 30 minutes
Explanation:
8:15+3=11:15
11:15+30=11:45
15 hr 30 min
8:15 - 9 am = 45 min
9 am to 11 pm = 14 hours
11pm - 11:45 pm = 45 min
90 min = 1 hr 30 min
14 hr + 1 hr 30 min = 15 hr 30 min
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