Mathematics · Time and Work
एक हौज में दो प्रवेशिका पाइप I1 और I2 हैं। अकेले I1 इसे 8 घंटे में भर सकता है और अकेले I2 इसे 4 घंटे में भर सकता है। यदि दोनों पाइपों को एक साथ खोल दिया जाए, तो हौज को भरने में कितना समय लगेगा?
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83 घंटे
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