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20लीटर मिश्रण में 60%अल्कोहल है कितना लीटर पानी और मिलाया जाए कि प्राप्त मिश्रण में 30% अल्कोहल हो ?

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20लीटर मिश्रण में 60%अल्कोहल है कितना लीटर पानी और मिलाया जाए कि प्राप्त मिश्रण में 30% अल्कोहल हो ?






 
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