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Railways PYQCBT 1 2020

RRB NTPC · Question 40

If 3 men or 6 boys can complete a task in 20 days, how many days will 6 men and 8 boys take to do the same task?

  1. 15

  2. 16

  3. 10

  4. 6

Show answer & explanation

Answer: (D) 6

Explanation

3 men = 6 boys, so 1 man = 2 boys. The work = 3 × 20 = 60 man-days. 6 men + 8 boys = 10 men, so 60/10 = 6 days.