SSC GD Constable previous year question
Two trains are moving in opposite directions at speeds of 60 km/hr and 110 km/hr. The length of one train is 360 m. They take 21 seconds to cross each other. Find the length (in m) of the other train, correct to 2 decimal places.
Asked in SSC GD Constable 2025: 04 Feb 2025 Shift 2 (Afternoon) · Quantitative Aptitude
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Correct answer: (D) 631.66
Relative speed = 170 km/hr = 170×5/18 m/s ≈ 47.22 m/s. Total distance = 47.22×21 ≈ 991.67 m. Length of other train = 991.67 − 360 ≈ 631.66 m.
हिंदी में प्रश्न
दो ट्रेनें 60 km/h और 110 km/h की चाल से विपरीत दिशाओं में गति कर रही हैं। एक ट्रेन की लंबाई 360 m हैं। उन्हें एक-दूसरे को पार करने में 21 सेकंड का समय लगता है। दूसरी ट्रेन की लंबाई (m में) दशमलव के 2 स्थानों तक ज्ञात कीजिए।
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सही उत्तर: (D) 631.66
सापेक्ष चाल = 170 km/hr = 170×5/18 m/s ≈ 47.22 m/s। कुल दूरी = 47.22×21 ≈ 991.67 m। दूसरी ट्रेन की लंबाई = 991.67 − 360 ≈ 631.66 m।
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