Mathematics · Time and Work
सोनू और रवि एक साथ मिलकर एक काम को 3 घंटे में पूरा कर सकते हैं जबकि सोनू अकेला उसी काम को 4 घंटे में पूरा कर सकता है। रवि अकेला उस काम को कितने घंटे में पूरा कर सकता है?
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