A car travels at an average speed of 60 miles per hour for the first 2 hours and then at 75 miles per hour for the next 3 hours. What is the car's average speed for the entire trip?

✓ Correct Answer: Option C

Total distance = (60 mph * 2 hr) + (75 mph * 3 hr) = 120 + 225 = 345 miles. Total time = 2 hr + 3 hr = 5 hours. Average speed = Total distance / Total time = 345 / 5 = 69 mph.