Multiple choice

A certain number of men can do a work in 45 days. If there were 8 men less it could be finished in 5 more days. How many men are there initialy? एक निश्चित संख्या में पुरूष एक कार्य को 45 दिन में पूरा कर सकते है। यदि पुरूषों की संख्या 8 कम हो जाये तो कार्य को पूरा करने में 5 दिन अधिक लगते है। प्रारम्भ में पुरूषों की संख्या कितनी थी ?

  1. 75

  2. 70

  3. 78

  4. 72

  5. None of these इनमें से कोई नहींV
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E Correct answer
Explanation

Let N be initial number of men. Total work = 45N man-days. With 8 fewer men (N-8), work takes 50 days, so total work = 50(N-8) man-days. Equating: 45N = 50(N-8), giving 45N = 50N - 400, so 5N = 400 and N = 80. Since 80 is not among the given options, the answer is 'None of these'.

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