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?

A 65 mph

B 67.5 mph

C 69 mph

D 70 mph

✓ 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.

💡 Why is C) the correct answer?

The correct answer to the question "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?" is Option C: 69 mph.

The other options — A) 65 mph, B) 67.5 mph, D) 70 mph — are incorrect for this GRE Exam Prep question. As explained above: 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.

📚 About This GRE Exam Prep Practice Question

This 2-level GRE 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.

How to use this page: Read the question above, consider all four options (A through D), then check the highlighted correct answer and explanation. For active timed practice, start a free GRE Exam Prep practice test or use flashcards for spaced repetition review.

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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

📚 About This GRE Exam Prep Practice Question

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