IB ACIO Grade II previous year question
A pipe fills a tank in 22 hours; another empties it in 33 hours. If both opened together, find the time (in hours) to fill 2/3 of the tank.
Asked in IB ACIO Grade II (16 Sep 2025 Shift 3) · Quantitative Aptitude
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Correct answer: (D) 44
Combined rate = 1/22 − 1/33 = 1/66 per hour. Time to fill 2/3 tank = (2/3)/(1/66) = 44 hours.
हिंदी में प्रश्न
एक पाइप एक टंकी को 22 घंटे में भर सकता है। एक अन्य पाइप भरी हुई टंकी को 33 घंटे में खाली कर सकता है। यदि दोनों पाइपों को एक साथ खोल दिया जाए, तो टंकी का 2/3 भाग भरने में लगने वाला समय (घंटों में) ज्ञात कीजिए।
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सही उत्तर: (D) 44
संयुक्त दर = 1/22 − 1/33 = 1/66 प्रति घंटा। 2/3 टंकी भरने का समय = (2/3)/(1/66) = 44 घंटे।
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