Mathematics · Time and Work
दो पाइप, A और B, एक टैंक को क्रमशः 4 3 घंटे (1 1 3 घंटे) और 2 घंटे में भर सकते हैं। यदि दोनों पाइपों को एक साथ खोल दिया जाए, तो टैंक कितने मिनट में पूरा भर जाएगा?
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