Multiple choice

12 Men working 8 hours a day complete a piece of work in 27 days .In how many days can 9 men working for 12 hours a day complete the same piece of work? 12 एक आदमी एक दिन में 8 घंटे काम करके किसी काम को 27 दिनों में पूरा करते है। कितने दिनों में 9 आदमी एक दिन में 12 घंटे काम करके उस काम को पूरा करेगें?

  1. 24 days/दिन

  2. 28 days/दिन

  3. 31 days/दिन

  4. 34 days/दिन
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A Correct answer
Explanation

Using the work formula M1 × D1 × H1 = M2 × D2 × H2: 12 × 27 × 8 = 9 × D2 × 12. Solving: 2592 = 108 × D2 giving D2 = 2592/108 = 24 days. The work is constant so man-days must balance.

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