Answer:
900
Explanation:
1 min. = 60 sec.
15 × 60 = 900
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• 1000 millisecond = 1 second
• 60 second = 1 minute
• 60 minutes = 1 hour
• 24 hours = 1 day
• 7 days = 1 week
• 4.3 weeks = 1 month
• 12 months = 1 year
• 10 years = 1 decade
• 10 decade = 1 century
