A car driving cross-country traveled 180 miles in 4 hours. At this rate of speed, how many miles further will the car travel in the next 3 hours? Let's think first. Chain of thought:
The car drives 180 miles in 4 hours, so its average speed is 180 miles / 4 hours = 45 miles per hour. In the next 3 hours, the car will drive 45 miles / hour * 3 hours = 135 miles.
Therefore, the answer is 135.