SSC GD Constable previous year question
Two trains are approaching each other from opposite directions at speeds of 110 km/h and 140 km/h. One train is 140 m long. It takes 5 seconds for them to cross each other. Find the length (in m, up to 2 decimal places) of the other train.
Asked in SSC GD Constable 2025: 11 Feb 2025 Shift 1 (Morning) · Quantitative Aptitude
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Correct answer: (B) 207.22
Relative speed = (110+140) km/h = 250×(5/18) m/s ≈ 69.44 m/s. Sum of lengths = 69.44×5 ≈ 347.22 m; other train's length = 347.22−140 = 207.22 m.
हिंदी में प्रश्न
दो ट्रेनें 110 km/h और 140 km/h की चाल से विपरीत दिशाओं से आ रही हैं। एक ट्रेन की लंबाई 140 m है। उन्हें एक दूसरे को पार करने में 5 सेकंड का समय लगता है। दूसरी ट्रेन की लंबाई (m में) दशमलव के 2 स्थानों तक ज्ञात कीजिए।
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उत्तर और व्याख्या देखें
सही उत्तर: (B) 207.22
सापेक्ष चाल = (110+140) km/h = 250×(5/18) m/s ≈ 69.44 m/s। दोनों की लंबाई का योग = 69.44×5 ≈ 347.22 m; दूसरी ट्रेन की लंबाई = 347.22−140 = 207.22 m।
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