SSC GD Constable previous year question
The speed of a stream is 4 km/h. A boat can go 20 km downstream and 14 km upstream in 3 hours. What is the speed (in km/h) of the boat in still water?
Asked in SSC GD Constable 2025: 10 Feb 2025 Shift 2 · Quantitative Aptitude
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Correct answer: (A) 12
Let boat speed = x; 20/(x+4) + 14/(x−4) = 3; solving gives x = 12 km/h.
हिंदी में प्रश्न
एक धारा की चाल 4 किमी/घंटा है। एक नाव 3 घंटे में 20 किमी धारा के अनुकूल और 14 किमी धारा के प्रतिकूल जा सकती है। शांत जल में नाव की चाल (किमी/घंटा में) क्या है?
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सही उत्तर: (A) 12
मान लीजिए नाव की चाल = x; 20/(x+4) + 14/(x−4) = 3; हल करने पर x = 12 किमी/घंटा प्राप्त होता है।
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