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To find out how many hours Kayleen's family was on the road, we can use the formula:
Time = Distance / Speed
First, let's calculate the total distance traveled by Kayleen's family:
Total distance = Distance on the first day + Distance on the second day
Total distance = 520 miles + 380 miles
Total distance = 900 miles
Next, we can calculate the time (in hours) by dividing the total distance by the average speed:
Time = Total distance / Average speed
Time = 900 miles / 60 miles per hour
Time = 15 hours
Therefore, Kayleen's family was on the road for 15 hours.