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Railways PYQCBT 1 2016

RRB NTPC · Question 31

The efficiency of work of P and Q are in the ratio 5 : 7. What will be the ratio of number of days taken by them to finish the work?

  1. 7 : 5
  2. 3 : 4
  3. 4 : 3
  4. 5 : 7
Show answer & explanation

Answer: (A) 7 : 5

Explanation

Time taken is inversely proportional to efficiency, so the ratio of days = 7 : 5.