SSC CHSL Tier-1 previous year question
A 70L milk-water mixture has 10% water. How much pure water should be added to make water 25%?
Asked in SSC CHSL Tier-1 (14 Nov 2025 Shift 3) · Quantitative Aptitude
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Correct answer: (D) 14 liters
Water=7L, milk=63L. Adding x liters water: (7+x)/(70+x)=0.25 → 7+x=17.5+0.25x → 0.75x=10.5 → x=14L.
हिंदी में प्रश्न
70 लीटर दूध-पानी के मिश्रण में 10% पानी है। पानी को 25% करने के लिए कितना शुद्ध पानी मिलाना होगा?
उत्तर जाँचने के लिए किसी विकल्प पर टैप करें।
उत्तर और व्याख्या देखें
सही उत्तर: (D) 14 लीटर
पानी=7लीटर, दूध=63लीटर। x लीटर पानी मिलाने पर: (7+x)/(70+x)=0.25 → x=14 लीटर।
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