Mathematics · Time and Work
पाइप A एक खाली टंकी को अकेले 13 घंटे में भर सकता है और पाइप B उसी टंकी को अकेले 16 घंटे में भर सकता है। दोनों को एक साथ खोलकर टंकी का आधा भाग भरने में उनके द्वारा लिया गया समय कितना होगा?
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