The rate of water flow through three pipes A, B and C are in the ratio 4 : 9 : 36. An empty tank can be filled

Question

The rate of water flow through three pipes A, B and C are in the ratio 4 : 9 : 36. An empty tank can be filled up completely by pipe A in 15 hours. If all the three pipes are used simultaneously to fill up this empty tank, the time, in minutes, required to fill up the entire tank completely is nearest to

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Accepted Answer

73. Let the rate of flow of water from pipe A be 4 x 4x 4 x units per hour. From the ratio of the rates of flow of water (4:9:36), we have that the rate of flow of water from pipe B should be 9 x 9x 9 x units per hour, and from pipe C should be 36 x 36x 36 x units per hour. Since pipe A fills the empty