Final answer:
The car's constant velocity is 60 mph, it will take an additional 4 hours to travel 240 more miles, and the total distance traveled after 8 hours will be 480 miles.
Step-by-step explanation:
The velocity of a car moving with a constant velocity that reaches its destination 120 miles away in 2 hours can be calculated using the formula velocity = distance / time. Therefore, velocity = 120 miles / 2 hours = 60 miles per hour (mph).
For the car to travel an additional 240 miles at the same velocity, the time required would be calculated by the formula time = distance / velocity. Therefore, time = 240 miles / 60 mph = 4 hours.
The total distance the car will travel after 8 hours at the same velocity would be 480 miles, calculated as velocity × time = 60 mph × 8 hours.