A tank can be filled by pipe A in 6 hours and by pipe B in 8 hours. How long to fill together?

A 3 hours 26 min

B 7 hours

C 14 hours

D 2 hours

✓ Correct Answer: Option A

Rate A = 1/6, Rate B = 1/8. Combined = 7/24 per hour. Time = 24/7 ≈ 3.43 hours ≈ 3 hours 26 min.

💡 Why is A) the correct answer?

The correct answer to the question "A tank can be filled by pipe A in 6 hours and by pipe B in 8 hours. How long to fill together?" is Option A: 3 hours 26 min.

The other options — B) 7 hours, C) 14 hours, D) 2 hours — are incorrect for this GMAT Exam Prep question. As explained above: Rate A = 1/6, Rate B = 1/8. Combined = 7/24 per hour. Time = 24/7 ≈ 3.43 hours ≈ 3 hours 26 min.

📚 About This GMAT Exam Prep Practice Question

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.

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 GMAT Exam Prep practice test or use flashcards for spaced repetition review.

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A tank can be filled by pipe A in 6 hours and by pipe B in 8 hours. How long to fill together?

✓ Correct Answer: Option A

📚 About This GMAT Exam Prep Practice Question

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