Mathematics · Time and Work
एक कार्य X पुरुषों द्वारा 15 दिनों में पूरा किया जा सकता है। 3 दिनों के बाद उनके साथ 10 और पुरुष शामिल हो जाते हैं। शेष कार्य अब 8 दिनों में पूरा हो जाता है। X का मान क्या है?
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