AP Police SI previous year question
Two pipes fill a tank in 20hrs and 30hrs. After tank is ⅓ full, a leak causes ⅓ of subsequent water to leak out. Total time (hrs) is
Asked in AP Police SI Prelims: 2018 (Paper I & II) · Quantitative Aptitude
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Correct answer: (B) 16
Combined rate=1/12/hr. First ⅓: 4hrs. After leak, effective rate=2/3×1/12=1/18; remaining ⅔ takes 12hrs. Total=16hrs.
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हिंदी में प्रश्न
दो पाइप एक टंकी को क्रमशः 20 घंटे और 30 घंटे में भरते हैं। टंकी के ⅓ भर जाने के बाद, एक रिसाव के कारण आगे भरे जाने वाले पानी का ⅓ भाग बह जाता है। कुल समय (घंटे) है
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सही उत्तर: (B) 16
संयुक्त दर=1/12/घंटा। पहला ⅓: 4 घंटे। रिसाव के बाद, प्रभावी दर=2/3×1/12=1/18; शेष ⅔ में 12 घंटे लगते हैं। कुल=16 घंटे।
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