RRB JE practice question
Pipe A can fill a tank in 4 hours while pipe B can empty the full tank in 20 hours. If both pipes are opened together, in how many hours will the tank be filled?
From a RRB JE General Awareness practice set · General Awareness
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Correct answer: (C) 5.0 hours
Net filling rate = 1/4 − 1/20 = 0.2 per hour. Time to fill = 1/(0.2) = 5.0 hours.
हिंदी में प्रश्न
पाइप A एक टंकी को 4 घंटे में भर सकता है जबकि पाइप B पूरी भरी टंकी को 20 घंटे में खाली कर सकता है। यदि दोनों पाइप एक साथ खोले जाएं, तो टंकी कितने घंटे में भरेगी?
उत्तर जाँचने के लिए किसी विकल्प पर टैप करें।
उत्तर और व्याख्या देखें
सही उत्तर: (C) 5.0 घंटे
निवल भरने की दर = 1/4 − 1/20 = 0.2 प्रति घंटा। भरने का समय = 1/(0.2) = 5.0 घंटे।
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