SSC CHSL Tier-1 previous year question
A 60L milk-water mixture has 20% water. How much pure milk should be added to make water 15%?
Asked in SSC CHSL Tier-1 (15 Nov 2025 Shift 1) · Quantitative Aptitude
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Correct answer: (C) 20 liters
Water=12L, milk=48L. Adding x liters milk: 12/(60+x)=0.15 → 12=9+0.15x → 0.15x=3 → x=20L.
हिंदी में प्रश्न
60 लीटर दूध-पानी के मिश्रण में 20% पानी है। पानी को 15% करने के लिए कितना शुद्ध दूध मिलाना होगा?
उत्तर जाँचने के लिए किसी विकल्प पर टैप करें।
उत्तर और व्याख्या देखें
सही उत्तर: (C) 20 लीटर
पानी=12लीटर। x लीटर दूध मिलाने पर: 12/(60+x)=0.15 → x=20 लीटर।
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