SSC GD Constable practice question
A car travels x km at 40 km/hr, another x km at 60 km/hr and 2x km at 80 km/hr. Find the average speed for the whole journey.
From a SSC GD Constable General Awareness practice set · General Awareness
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Correct answer: (A) 60 km/hr
Total distance = 4x; total time = x/40 + x/60 + 2x/80 = x/15; average speed = 4x/(x/15) = 60 km/hr.
हिंदी में प्रश्न
एक कार x km की दूरी 40 km/hr की चाल से , िफर और x km की दूरी 60 km/hr की चाल से और 2x km की दूरी 80 km/hr की चाल से तय करती है। संपूण यात्रा के िलए औसत चाल ात कीिजए।
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सही उत्तर: (A) 60 km/hr
कुल दूरी = 4x; कुल समय = x/40 + x/60 + 2x/80 = x/15; औसत चाल = 4x/(x/15) = 60 किमी/घंटा।
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