RRB NTPC CBT-1 previous year question
A car travels 120 km at 40 km/h, 180 km at 60 km/h, and 100 km at 50 km/h. What is the average speed of the car for the entire journey?
Asked in RRB NTPC 2026 — 17 June Shift 1 · Quantitative Aptitude
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Correct answer: (A) 50 km/h
Average speed = total distance/total time = (120+180+100)/(120/40+180/60+100/50) = 400/8 = 50 km/h.
हिंदी में प्रश्न
एक कार 120 km की दूरी 40 km/h की चाल से, 180 km की दूरी 60 km/h की चाल से और 100 की दूरी 50 km/h की चाल से तय करती है। संपूर्ण यात्रा के लिए कार की औसत चाल ज्ञात कीजिए।
उत्तर जाँचने के लिए किसी विकल्प पर टैप करें।
उत्तर और व्याख्या देखें
सही उत्तर: (A) 50 km/h
औसत गति = कुल दूरी/कुल समय = (120+180+100)/(120/40+180/60+100/50) = 400/8 = 50 किमी/घंटा।
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