SSC CGL Tier-1 previous year question
A policeman noticed a thief at a distance of 500 metres. The policeman started running and the thief also started running at the same time. The thief is running at a speed of 15 km/h. It took 15 minutes for the policeman to catch the thief. Find the speed of the policeman (in km/h).
Asked in SSC CGL Tier-1: 2024 Sep 10 Shift 2 () · Quantitative Aptitude
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Correct answer: (B) 17
Thief runs at 15 km/h for 15 minutes (0.25 h), covering 15×0.25 = 3.75 km. The policeman must cover the initial 500 m (0.5 km) gap plus the 3.75 km the thief ran, i.e. 4.25 km in 0.25 h. Speed = 4.25/0.25 = 17 km/h.
हिंदी में प्रश्न
एक पुलिसकर्मी ने 500 मीटर की दूरी पर एक चोर को देखा। पुलिसकर्मी और चोर दोनों ने एक साथ दौड़ना शुरू किया। चोर 15 किमी/घंटा की गति से दौड़ रहा है। पुलिसकर्मी को चोर पकड़ने में 15 मिनट लगे। पुलिसकर्मी की गति (किमी/घंटा में) ज्ञात करें।
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सही उत्तर: (B) 17
चोर 15 किमी/घंटा की गति से 15 मिनट (0.25 घंटा) में 15×0.25 = 3.75 किमी दौड़ता है। पुलिसकर्मी को शुरुआती 500 मीटर (0.5 किमी) की दूरी के साथ-साथ चोर द्वारा तय की गई 3.75 किमी दूरी भी 0.25 घंटे में तय करनी होगी, अर्थात कुल 4.25 किमी। गति = 4.25/0.25 = 17 किमी/घंटा।
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