SSC GD Constable previous year question
Two trains are moving in opposite directions at speeds of 80 km/h and 70 km/h. The length of one train is 180 m. The time taken by them to cross each other is 19 seconds. The length (in m) of the other train, correct to 2 decimal places, is:
Asked in SSC GD Constable 2025: 12 Feb 2025 Shift 3 · Quantitative Aptitude
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Correct answer: (B) 611.66
Relative speed = (80+70) km/h ≈ 41.67 m/s; total length covered = 41.67×19 ≈ 791.67 m; length of other train = 791.67−180 ≈ 611.66 m.
हिंदी में प्रश्न
दो रेलगाड़ियाँ 80 किमी/घं और 70 किमी/घं की चाल से विपरीत दिशाओं में चल रही हैं। एक रेलगाड़ी की लंबाई 180 मी है। उन्हें एक-दूसरे को पार करने में 19 सेकंड का समय लगता है। दूसरी रेलगाड़ी की लंबाई (मी में), 2 दशमलव स्थान तक सही, है:
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सही उत्तर: (B) 611.66
सापेक्ष चाल = (80+70) किमी/घं ≈ 41.67 मी/से; कुल तय की गई लंबाई = 41.67×19 ≈ 791.67 मी; दूसरी रेलगाड़ी की लंबाई = 791.67−180 ≈ 611.66 मी।
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