RRB NTPC CBT-1 previous year question
A bus travels 90 km at 45 km/h, 120 km at 60 km/h, and 150 km at 75 km/h. What is the average speed of the bus for the entire journey?
Asked in RRB NTPC 2026 — 18 June Shift 2 · Quantitative Aptitude
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Correct answer: (D) 60 km/h
Total distance = 90+120+150 = 360 km; total time = 90/45 + 120/60 + 150/75 = 2+2+2 = 6 hours. Average speed = 360/6 = 60 km/h.
हिंदी में प्रश्न
एक बस 90 km की दूरी 45 km/h की चाल से, 120 km की दूरी 60 km/h की चाल से और 150 km की दूरी 75 km/h को चाल से तय करती है। संपूर्ण यात्रा के लिए बस को औसत चाल ज्ञात कोजिए।
उत्तर जाँचने के लिए किसी विकल्प पर टैप करें।
उत्तर और व्याख्या देखें
सही उत्तर: (D) 70 km/h
कुल दूरी = 90+120+150 = 360 किमी; कुल समय = 90/45 + 120/60 + 150/75 = 2+2+2 = 6 घंटे। औसत गति = 360/6 = 60 किमी/घं।
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