SSC GD Constable previous year question
Two trains having lengths of 340 m and 360 m are running at speeds of 80 km/h and 90 km/h, respectively, in the same direction. The time taken (in minutes) by the faster train, coming from behind, to completely cross the other train is:
Asked in SSC GD Constable 2025: 07 Feb 2025 Shift 2 · Quantitative Aptitude
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Correct answer: (B) 4.2
Relative speed = 10 km/h = 25/9 m/s. Total length = 700 m. Time = 700÷(25/9) = 252 s = 4.2 minutes.
हिंदी में प्रश्न
340 मीटर और 360 मीटर लंबाई की दो रेलगाड़ियां क्रमशः 80 किमी/घंटा और 90 किमी/घंटा की गति से एक ही दिशा में चल रही हैं। पीछे से आ रही तेज रेलगाड़ी को दूसरी रेलगाड़ी को पूरी तरह पार करने में लगने वाला समय (मिनटों में) है:
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उत्तर और व्याख्या देखें
सही उत्तर: (B) 4.2
सापेक्ष गति = 10 किमी/घंटा = 25/9 मी/से। कुल लंबाई = 700 मीटर। समय = 700÷(25/9) = 252 सेकंड = 4.2 मिनट।
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