68. If takes 12 hourse to fill a swimming pool using two pipes. If the larger pipe is used for 4 hours and the smaller pipe for 9 hours, only half the pool is filled. How long would it take for each pipealone to fill the pool.
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you will easily get this question and answer in RD Shrama class 10
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you will easily get this question answer in RD Sharma class 10
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