AP Police SI previous year question
Two solutions of 90% and 97% purity are mixed to make 21 litres of 94% purity. The quantity (litres) of the 97% solution is
Asked in AP Police SI Prelims: 2023 (Paper I & II) · Quantitative Aptitude
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Correct answer: (D) 12
0.9(21−y) + 0.97y = 0.94×21 → 18.9 + 0.07y = 19.74 → y = 12.
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हिंदी में प्रश्न
90% और 97% शुद्धता वाले दो विलयनों को मिलाकर 94% शुद्धता के 21 लीटर विलयन बनाए जाते हैं। 97% वाले विलयन की मात्रा (लीटर) है
उत्तर जाँचने के लिए किसी विकल्प पर टैप करें।
उत्तर और व्याख्या देखें
सही उत्तर: (D) 12
0.9(21−y) + 0.97y = 0.94×21 → 18.9 + 0.07y = 19.74 → y = 12.
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