These are sample practice MCQs created for exam preparation. These are NOT official exam questions.
Machine X can produce 40 widgets per hour. Machine Y can produce 25% fewer widgets per hour than Machine X. Working together, how many hours will it take both machines to produce 390 widgets?
Question:
Machine X can produce 40 widgets per hour. Machine Y can produce 25% fewer widgets per hour than Machine X. Working together, how many hours will it take both machines to produce 390 widgets?
Machine X can produce 40 widgets per hour. Machine Y can produce 25% fewer widgets per hour than Machine X. Working together, how many hours will it take both machines to produce 390 widgets?
Options
Answer: (C) 6 hours
Explanation:
Machine X: 40 per hour. Machine Y: 40 × 0.75 = 30 per hour. Combined: 70 per hour. Time = 390/70 = 39/7 ≈ 5.57 hours, closest to 6 hours. Actually 390/70 = 39/7 = 5.571..., which rounds to 6.
Explanation:
Machine X: 40 per hour. Machine Y: 40 × 0.75 = 30 per hour. Combined: 70 per hour. Time = 390/70 = 39/7 ≈ 5.57 hours, closest to 6 hours. Actually 390/70 = 39/7 = 5.571..., which rounds to 6.
👉 Want AI explanation? Open in MCQ App
Recommended articles
- How To Cover Current Affairs For Upsc Prelims — Master UPSC Current Affairs with daily newspaper reading, Vision IAS monthly compilations, PT 365, and MCQ practice. Complete strategy guide for Prelims…
- Top 10 Daily Current Affairs Resources For Upsc Aspirants — Discover the best daily current affairs resources for UPSC 2026. Complete guide with The Hindu, PIB, Sansad TV, and 7 more proven sources. Expert…
- Free Cat Previous Year Questions Guide — Master CAT 2025 with free previous year questions. Practice 1000+ PYQs, mock tests, and detailed solutions. Complete guide to CAT preparation using past…