RRB NTPC CBT-1 previous year question
A bus covers 150 km at 60 km/hr, 120 km at 80 km/hr, and 180 km at 90 km/hr without any stops. What is the average speed of the bus for the entire journey?
Asked in RRB NTPC 2026 — 14 June Shift 1 · Quantitative Aptitude
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Correct answer: (D) 75 km/hr
Total distance = 150+120+180 = 450 km. Total time = 150/60 + 120/80 + 180/90 = 2.5+1.5+2 = 6 hours. Average speed = 450/6 = 75 km/hr.
हिंदी में प्रश्न
एक बस बिना रुके 150 km की दूरी 60 km/hr की चाल से तय करती है, 120 km की दूरी 80 km/hr की चाल से तय करती है और 180 km को दूरी 90 km/hr को चाल से तय करती है। संपूर्ण यात्रा के लिए बस की औसत चाल कितनी है?
उत्तर जाँचने के लिए किसी विकल्प पर टैप करें।
उत्तर और व्याख्या देखें
सही उत्तर: (D) 85 km/hr
कुल दूरी = 150+120+180 = 450 किमी। कुल समय = 150/60 + 120/80 + 180/90 = 2.5+1.5+2 = 6 घंटे। औसत गति = 450/6 = 75 किमी/घंटा।
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