SSC GD Constable previous year question
Two trains are moving in opposite directions at speeds of 60 km/h and 110 km/h. The length of one train is 360 m. The time taken by them to cross each other is 21 seconds. The length (in m) of the other train, correct to 2 decimal places, is:
Asked in SSC GD Constable 2025: 04 Feb 2025 Shift 2 · Quantitative Aptitude
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Correct answer: (B) 631.66
Relative speed = 170 km/h = 170×5/18 = 47.22 m/s. Total distance = 47.22×21 ≈ 991.67 m. Other train's length = 991.67−360 = 631.66 m.
हिंदी में प्रश्न
दो रेलगाड़ियाँ विपरीत दिशाओं में क्रमशः 60 किमी/घंटा और 110 किमी/घंटा की गति से चल रही हैं। एक रेलगाड़ी की लंबाई 360 मीटर है। उन्हें एक-दूसरे को पार करने में 21 सेकंड लगते हैं। दूसरी रेलगाड़ी की लंबाई (मीटर में), 2 दशमलव स्थानों तक सही, क्या है?
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सही उत्तर: (B) 631.66
सापेक्ष गति = 170 किमी/घंटा = 170×5/18 = 47.22 मी/से। कुल दूरी = 47.22×21 ≈ 991.67 मी। दूसरी रेलगाड़ी की लंबाई = 991.67−360 = 631.66 मी।
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