Mathematics · Time and Work
रॉबिन और वरुण मिलकर एक हॉल को 6 दिनों में पेंट कर सकते हैं। रॉबिन अकेला इसे 42 दिनों में पेंट कर सकता है। वरुण अकेला इसे कितने दिनों में पेंट कर सकता है?
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