SSC CHSL Tier-1 practice question
In a 711 m race, Chetan gives Danish a head start of 162 m and still wins by 45 m. If Chetan completes the race in 56 seconds, how long does Danish take to complete his run?
From a SSC CHSL Tier-1 Quantitative Aptitude practice set · Quantitative Aptitude
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Correct answer: (D) 79 s
Danish needs to cover (711−162)=549 m, but when Chetan finishes, Danish has covered only (549−45)=504 m. Speed ratio Va:Vb = 711:504 = 79:56. Danish's time = 56 × (711/504) = 79 s.
हिंदी में प्रश्न
711 मीटर की दौड़ में चेतन दानिश को 162 मीटर की शुरुआत देता है और फिर भी 45 मीटर से जीतता है। यदि चेतन दौड़ 56 सेकंड में पूरी करता है, तो दानिश को अपनी दौड़ पूरी करने में कितना समय लगता है?
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सही उत्तर: (D) 79 सेकंड
दानिश को (711−162)=549 मीटर दौड़नी है, परंतु चेतन के पूरा करने तक दानिश केवल (549−45)=504 मीटर तय कर पाता है। चाल अनुपात Va:Vb = 711:504 = 79:56। दानिश का समय = 56 × (711/504) = 79 सेकंड।
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