SSC GD Constable previous year question
Two trains having lengths of 150 m and 350 m are running at speeds of 60 km/h and 120 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 1 · Quantitative Aptitude
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Correct answer: (D) 0.5
Relative speed = 120−60=60 km/h = 50/3 m/s. Total distance = 150+350=500 m. Time = 500/(50/3) = 30 sec = 0.5 min.
हिंदी में प्रश्न
150 मीटर और 350 मीटर लंबाई की दो रेलगाड़ियाँ क्रमशः 60 किमी/घं और 120 किमी/घं की गति से एक ही दिशा में चल रही हैं। पीछे से आने वाली तेज रेलगाड़ी को दूसरी रेलगाड़ी को पूरी तरह पार करने में लगने वाला समय (मिनट में) है:
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सही उत्तर: (D) 0.5
सापेक्ष गति = 120−60=60 किमी/घं = 50/3 मी/से। कुल दूरी = 150+350=500 मी। समय = 500/(50/3) = 30 सेकंड = 0.5 मिनट।
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