SSC GD Constable previous year question
In a circular race of 800 m length, Ram and Mohan start at speeds of 25 m/sec and 40 m/sec, respectively, at the same time from the same point. After how much time will they meet for the first time at the starting point, when running in the same direction?
Asked in SSC GD Constable 2025: 07 Feb 2025 Shift 1 · Quantitative Aptitude
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Correct answer: (D) 160 seconds
Time for Ram to complete one round = 800/25=32 sec; for Mohan = 800/40=20 sec. LCM(32,20)=160 seconds, when both meet at the starting point.
हिंदी में प्रश्न
800 मीटर लंबाई की एक वृत्ताकार दौड़ में, राम और मोहन एक ही बिंदु से एक ही समय पर क्रमशः 25 मी/से और 40 मी/से की गति से शुरू करते हैं। एक ही दिशा में दौड़ते हुए, वे पहली बार प्रारंभिक बिंदु पर कितने समय बाद मिलेंगे?
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सही उत्तर: (D) 160 सेकंड
राम को एक चक्कर पूरा करने में समय = 800/25=32 सेकंड; मोहन को = 800/40=20 सेकंड। LCM(32,20)=160 सेकंड, जब दोनों प्रारंभिक बिंदु पर मिलेंगे।
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