SSC GD Constable previous year question
Two trains of lengths 210 m and 140 m are running in the same direction at speeds of 80 km/h and 150 km/h respectively. How much time (in minutes) will the faster train coming from behind take to completely cross the other train?
Asked in SSC GD Constable 2025: 04 Feb 2025 Shift 1 (Morning) · Quantitative Aptitude
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Correct answer: (A) 0.3
Relative speed = 150 − 80 = 70 km/h = 70×5/18 m/s; total length = 350 m; time = 350/(70×5/18) = 18 sec = 0.3 min.
हिंदी में प्रश्न
210 m और 140 m लंबाई वाली दो रेलगाड़ियाँ एक ही दिशा में क्रमशः 80 km/h और 150 km/h की चाल से गतिमान हैं। पीछे से आ रही तेज चाल वाली रेलगाड़ी द्वारा दूसरी रेलगाड़ी को पूरी तरह से पार करने में कितना समय (मिनटों में) लगेगा?
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सही उत्तर: (A) 0.3
सापेक्ष चाल = 150 − 80 = 70 km/h; कुल लंबाई = 350 m; समय = 350/(70×5/18) = 18 सेकंड = 0.3 मिनट।
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