SSC GD Constable previous year question
A person travels from Kolkata to Ahmedabad at a speed of 9 km/hr, and returns to Kolkata by the same route at a speed of 18 km/hr. Find his average speed (in km/hr) during the entire journey.
Asked in SSC GD Constable 2025: 04 Feb 2025 Shift 1 (Morning) · Quantitative Aptitude
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Correct answer: (B) 12
Average speed for equal distances = 2xy/(x+y) = 2×9×18/27 = 324/27 = 12 km/hr.
हिंदी में प्रश्न
एक व्यक्ति 9 km/hr की चाल से कोलकाता से अहमदाबाद जाता है तथा उसी मार्ग से 18 km/hr की चाल से कोलकाता वापस आता है। पूरी यात्रा के दौरान उसकी औसत चाल (km/hr में) ज्ञात कीजिए।
उत्तर जाँचने के लिए किसी विकल्प पर टैप करें।
उत्तर और व्याख्या देखें
सही उत्तर: (B) 12
बराबर दूरी हेतु औसत चाल = 2xy/(x+y) = 2×9×18/27 = 324/27 = 12 km/hr।
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