Railways PYQCBT 1 2016

RRB NTPC · Question 59

6 boys or 10 girls can do a job in 25 days. How many days will it take 12 boys and 30 girls to do the same work? A. 10 B. 5 C. 15 D. 20

  1. C

  2. D

  3. A

  4. B

Show answer & explanation

Answer: (D) B

Explanation

6 boys = 10 girls, so 12 boys = 20 girls, and 12 boys + 30 girls = 50 girls. 10 girls take 25 days (250 girl-days), so 50 girls take 5 days.