Machine A can produce 100 widgets in 4 hours. Machine B can produce 100 widgets in 5 hours. If both machines work together, how many widgets can they produce in 3 hours?

A 105

B 120

C 135

D 150

✓ Correct Answer: Option C

Machine A's rate is 25 widgets/hour. Machine B's rate is 20 widgets/hour. Combined, they produce 45 widgets/hour. In 3 hours, they produce 45 * 3 = 135 widgets.

💡 Why is C) the correct answer?

The correct answer to the question "Machine A can produce 100 widgets in 4 hours. Machine B can produce 100 widgets in 5 hours. If both machines work together, how many widgets can they produce in 3 hours?" is Option C: 135.

The other options — A) 105, B) 120, D) 150 — are incorrect for this GMAT Exam Prep question. As explained above: Machine A's rate is 25 widgets/hour. Machine B's rate is 20 widgets/hour. Combined, they produce 45 widgets/hour. In 3 hours, they produce 45 * 3 = 135 widgets.

📚 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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Machine A can produce 100 widgets in 4 hours. Machine B can produce 100 widgets in 5 hours. If both machines work together, how many widgets can they produce in 3 hours?

✓ Correct Answer: Option C

📚 About This GMAT Exam Prep Practice Question

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