RRB NTPC CBT-1 previous year question
A train met with an accident 50 km away from station A. It completed the remaining journey at three-fourth of its original speed and reached station B 35 minutes late. Had the accident occurred 24 km further down the line, it would have been only 25 minutes late. What is the original speed of the train?
Asked in RRB NTPC 2026 — 18 June Shift 3 · Quantitative Aptitude
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Correct answer: (D) 48 km/hr
Let original speed = v and remaining distance after the first accident point = D. Delay = (1/3)*(D)/v = 35 min, and for the second scenario with 24 km less remaining distance, delay = (1/3)*(D-24)/v = 25 min. Subtracting the two equations gives (1/3)*24/v = 10 min = 1/6 hr, so v = 48 km/hr.
हिंदी में प्रश्न
एक ट्रेन, स्टेशन AG 50 km दूर दुर्घटना के कारण बाधित होती है। उसने शेष यात्रा अपनी मूल चाल के चाल से पूरी को और स्टेशन 35 पर 24 मिनट को देरी से पहुंची। यदि दुर्घटना 24 km आगे चलकर होती, तो ट्रेन केवल 25 मिनट की देरी से पहुचती। ट्रेन की मूल चाल कितनी है? 
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सही उत्तर: (D) 40 km/hr
मान लीजिए मूल गति v है और पहले दुर्घटना बिंदु के बाद शेष दूरी D है। देरी = (1/3)*(D)/v = 35 मिनट, और दूसरी स्थिति में 24 किमी कम शेष दूरी के साथ, देरी = (1/3)*(D-24)/v = 25 मिनट। दोनों समीकरणों को घटाने पर (1/3)*24/v = 10 मिनट = 1/6 घंटा, अतः v = 48 किमी/घंटा।
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