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Railways PYQCBT 2 2017

RRB NTPC · Question 82

12 men or 24 boys can do a work in 20 days. In how many days, will 24 men and 12 boys together complete the same work?

  1. 10

  2. 12

  3. 15

  4. 8

Show answer & explanation

Answer: (D) 8

Explanation

12 men = 24 boys, so 1 man = 2 boys. The work = 12 × 20 = 240 man-days. 24 men + 12 boys = 30 men, so they take 240/30 = 8 days.