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दो पाइप A तथा B किसी हौज को क्रमश: 20 तथा 30 मिनटों में भरते हैं। यदि दोनों पाइप एकसाथ खोले जाएँ‚ तो हौज कितने समय में भर जाएगा? Two pipes A and B can fill a tank in 20 min and 30 min respectively. If both the pipes are used together than how long it will take to fill the tank?

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दो पाइप A तथा B किसी हौज को क्रमश: 20 तथा 30 मिनटों में भरते हैं। यदि दोनों पाइप एकसाथ खोले जाएँ‚ तो हौज कितने समय में भर जाएगा? Two pipes A and B can fill a tank in 20 min and 30 min respectively. If both the pipes are used together than how long it will take to fill the tank?






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