A और B मिलकर एक कार्य को 20 दिनों में पूरा करते हैं। B अकेले उस कार्य को 30 दिनों में पूरा करता है। ज्ञात कीजिए कि A अकेले उस कार्य को कितने दिनों में पूरा करेगा?

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RRB Clerk Prelims Memory Based Paper (Held On: 17 August 2024 Shift 4)
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  1. 50
  2. 60
  3. 40
  4. 45
  5. 72

Answer (Detailed Solution Below)

Option 2 : 60
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गणना

कुल कार्य = 20 और 30 का LCM = 60

B की दक्षता = 60 /30 = 2

A और B की कुल दक्षता = 60/20 = 3

इसलिए, A की दक्षता = 3 -2 = 1

इसलिए, A अकेले कार्य को 60 / 1 = 60 दिनों में पूरा करेगा। 

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