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Four pipes A, B, C, and D can fill a tank in 3, 6, 9 and 12 days respe

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Four pipes A, B, C, and D can fill a tank in 3, 6, 9 and 12 days respe [#permalink] New post   06 Apr 2025, 00:42
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Four pipes A, B, C, and D can fill a tank in 3, 6, 9 and 12 days respectively. What is the least portion of tank that can be filled in one day by any three of the pipes working together at their respective rates?


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Four pipes A, B, C, and D can fill a tank in 3, 6, 9 and 12 days respe [#permalink]
06 Apr 2025, 00:42
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