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Railways PYQCBT 1 2016

RRB NTPC · Question 15

15 men can do a work in 330 days. But after 220 days 15 more people are recruited, then in how many more days the work will be completed? A. 80 days B. 60 days C. 55 days D. 50 days

  1. D

  2. C

  3. B

  4. A

Show answer & explanation

Answer: (B) C

Explanation

Total work = 15 × 330 = 4,950 man-days. In 220 days 15 × 220 = 3,300 is done, leaving 1,650. With 30 men it takes 1,650/30 = 55 more days.