A car traveled 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 was the car's average speed for the entire trip?
✓ Correct Answer: Option B
First leg: distance = 60 mph * 0.5 hr = 30 miles. Second leg: distance = 40 mph * 0.75 hr = 30 miles. Total distance = 30 + 30 = 60 miles. Total time = 0.5 + 0.75 = 1.25 hours. Average speed = Total distance / Total time = 60 / 1.25 = 48 mph.
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This 2-level GMAT Exam Prep question from the Quantitative Reasoning topic is part of BrainForge Quiz's free exam preparation library. Each question includes the correct answer and a detailed explanation to help you understand the underlying concept, not just memorize the answer.
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