Final answer:
To reach the destination, it will take 6 hours of driving at 60 miles per hour for the remaining 360 miles.
Step-by-step explanation:
If you have already driven 120 miles and need to drive a total of 480 miles, you have 480 - 120 = 360 miles left to travel. Since you are driving at a speed of 60 miles per hour, we can calculate the time remaining to reach your destination by dividing the remaining distance by your speed. So, 360 miles รท 60 miles per hour = 6 hours.