A car travels at an average speed of 60 miles per hour for the first 30 minutes and then at an average speed of 40 miles per hour for the next 45 minutes. What is the car's average speed for the entire trip?

✓ Correct Answer: Option A

Average speed = Total Distance / Total Time. First 30 min (0.5 hr): Distance = 60 * 0.5 = 30 miles. Next 45 min (0.75 hr): Distance = 40 * 0.75 = 30 miles. Total Distance = 30 + 30 = 60 miles. Total Time = 0.5 + 0.75 = 1.25 hours. Average Speed = 60 / 1.25 = 48 mph.