medium · GRE Quantitative Reasoning
A car travels at 45 miles per hour for the first 3 hours of a trip and then increases its speed to 60 miles per hour for the next 2 hours.
What is the average speed of the car for the entire 5-hour trip?
- 48.0 mph
- 51.0 mph
- 52.5 mph
- 54.0 mph
- 55.5 mph
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