SSC GD Constable previous year question
Ayush starts his journey from Chandigarh to Ludhiana with his car at a speed of 77 km/hr and returns at a speed of 63 km/hr. If the distance between Chandigarh and Ludhiana is 97 km, then what is the average speed (in km/hr) of Ayush during his whole journey?
Asked in SSC GD Constable 2025: 12 Feb 2025 Shift 3 · Quantitative Aptitude
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Correct answer: (D) 69.3
Average speed for equal distances = 2xy/(x+y) = 2×77×63/(77+63) = 9702/140 = 69.3 km/hr, independent of the actual distance.
हिंदी में प्रश्न
आयुष अपनी कार से चंडीगढ़ से लुधियाना की यात्रा 77 किमी/घं की चाल से शुरू करता है और 63 किमी/घं की चाल से वापस लौटता है। यदि चंडीगढ़ और लुधियाना के बीच की दूरी 97 किमी है, तो आयुष की पूरी यात्रा के दौरान औसत चाल (किमी/घं में) क्या है?
उत्तर जाँचने के लिए किसी विकल्प पर टैप करें।
उत्तर और व्याख्या देखें
सही उत्तर: (D) 69.3
बराबर दूरी के लिए औसत चाल = 2xy/(x+y) = 2×77×63/(77+63) = 9702/140 = 69.3 किमी/घं, जो वास्तविक दूरी से स्वतंत्र है।
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