Mathematics · Time and Work
दो पाइप A और B एक टैंक को क्रमशः 6 और 12 घंटे में भर सकते हैं। यदि दोनों पाइपों को एक साथ खोल दिया जाए, तो टैंक को भरने में कितना समय लगेगा?
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सही उत्तर देखें
4 घंटे
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