Mathematics · Time and Work
एक टैंक को एक प्रवेशिका (इनलेट) पाइप द्वारा 8 घंटे में भरा जा सकता है। दूसरा निकास (आउटलेट) पाइप उसी टैंक को 12 घंटे में खाली कर सकता है। यदि दोनों पाइपों को एक साथ खोल दिया जाए, तो खाली टैंक को पूरी तरह भरने में कितना समय लगेगा?
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