RRB NTPC CBT-1 previous year question
Two trains P and Q, measure 200 m and 300 m in length, respectively. The faster train, coming from behind, takes 48 seconds to overtake the slower when moving in the same direction. When they approach each other from opposite directions, they cross each other completely in 20 seconds. Determine the speed of the faster train.
Asked in RRB NTPC 2026 — 16 June Shift 3 · Quantitative Aptitude
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Correct answer: (C) 63.75 km/h
Combined length=500m. Same direction (48s): speed difference=500/48 m/s. Opposite direction (20s): speed sum=500/20=25 m/s. Solving simultaneously gives faster train's speed=(25+500/48)/2×3.6≈63.75 km/h.
हिंदी में प्रश्न
दो ट्रेनें? और 200 की लंबाई क्रमशः 300 m और 300 m है। पीछे से आ रही तेज़ ट्रेन, समान दिशा में चलते हुए, धीर्मी ट्रेन को ओवरटंक करने में 48 सेकेड का समय लेती है। जब वे विपरीत दिशाओं से एक-दूसरे की ओर आती हैं, तो वे 20 सेकंड में एक-द्वूसर को पार कर जाती Sl तेज़ ट्रेन की चाल ज्ञात कोजिए।
उत्तर जाँचने के लिए किसी विकल्प पर टैप करें।
उत्तर और व्याख्या देखें
सही उत्तर: (C) 60.75 km/h
कुल लंबाई=500मी। समान दिशा (48से): गति अंतर=500/48 मी/से। विपरीत दिशा (20से): गति योग=500/20=25 मी/से। समीकरण हल करने पर तेज ट्रेन की गति=(25+500/48)/2×3.6≈63.75 किमी/घं है।
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