How many hours are in 3600 seconds?

• A. 1 hour
• B. 0.5 hours
• C. 2 hours
• D. 3600 hours

Answer: (A)

Unit conversions for time rely on fixed relationships: 1 hour equals 60 minutes and 1 minute equals 60 seconds, so 1 hour equals 3600 seconds. To find how many hours are in 3600 seconds, divide by the number of seconds per hour: 3600 ÷ 3600 = 1. Therefore, 3600 seconds is 1 hour.

For context, 0.5 hours is 1800 seconds, 2 hours is 7200 seconds, and 3600 hours would be far larger than 3600 seconds.