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Railways PYQCBT 1 2016

RRB NTPC · Question 71

X can copy 60 pages in 4 minutes, X and Y together can copy 750 pages in 30 minutes. In how many minutes can Y copy 100 pages? A. 8 B. 16 C. 10 D. 5

  1. D

  2. B

  3. C

  4. A

Show answer & explanation

Answer: (C) C

Explanation

X copies 15 pages per minute; X and Y together copy 750/30 = 25 per minute, so Y copies 10 per minute and takes 10 minutes for 100 pages.