Multiple choice

If Ram and Shyam together can complete a piece of work in 15 days and Shyam alone in 20 days, in how many days can Ram alone complete the work? यदि राम और श्याम एकसाथ मिलकर एक कार्य को 15 दिनों में पूरा करते हैं और श्याम अकेला इसे 20 दिनों में करता है, इस कार्य को राम कितने दिनों में पूरा कर सकता है?

  1. 60 days / दिन

  2. 45 days / दिन

  3. 40 days / दिन

  4. 30 days / दिन
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A Correct answer
Explanation

Combined rate = 1/15 work per day. Shyam's rate = 1/20 work per day. Ram's rate = 1/15 - 1/20 = 4/60 - 3/60 = 1/60. Ram alone takes 60 days. The key is converting work time to rates and using subtraction.

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