Answer: 14400 seconds
Explanation:
As you know one hour is 60 minutes and one minutes is 60 seconds.
1 hour=60 min : 1 min=60 sec
For 4 hours, multiply 4 by 60 and then multiply the result by 60 again.
4*60=240
240*60= 14400
So, your answer is 14,400 seconds.
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Hope this helps!