IB ACIO Grade II previous year question
Pipe A fills a tank in 24 hrs; pipe B empties it in 28 hrs. Both opened together — time to fill two-thirds of the tank?
Asked in IB ACIO Grade II (16 Sep 2025 Shift 1) · Quantitative Aptitude
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Correct answer: (A) 112
Net rate = 1/24 − 1/28 = (28−24)/672 = 4/672 = 1/168 per hour. Time for 2/3 tank = (2/3)÷(1/168) = 112 hours.
हिंदी में प्रश्न
एक पाइप टंकी को 24 घंटे में भरता है, दूसरा 28 घंटे में खाली करता है। दोनों साथ खोलने पर टंकी का 2/3 भाग भरने में कितना समय लगेगा?
उत्तर जाँचने के लिए किसी विकल्प पर टैप करें।
उत्तर और व्याख्या देखें
सही उत्तर: (A) 112
नेट दर = 1/24 − 1/28 = 4/672 = 1/168 प्रति घंटा. 2/3 टंकी भरने का समय = (2/3)÷(1/168) = 112 घंटे.
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