Two cars, car A and car B, start at the same time from opposite ends of a 120 mile stretch of a road. Car A travels at 40 mph and car B travels at 60 mph. How long will it take for the two cars to meet?
Correct: A
Car A travels at a speed of 40 mph, so in t hours, it will travel 40t miles. Car B travels at a speed of 60 mph, so in t hours, it will travel 60t miles. When they meet, the sum of the distances they have traveled must be 120 miles: 40t + 60t = 120. This equation simplifies to 100t = 120, or t = 1.2 hours.