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Railways PYQCBT 1 2016

RRB NTPC · Question 6

The ratio of speeds of X and Y is 5 : 7. Y covers a distance of 420 km in 3 hours. What is speed of X? A. 80 kmph B. 90 kmph C. 100 kmph D. 110 kmph

  1. C

  2. A

  3. D

  4. B

Show answer & explanation

Answer: (A) C

Explanation

Speed of Y = 420 km / 3 h = 140 km/h. Speeds are in the ratio X : Y = 5 : 7, so X = 140 × 5/7 = 100 km/h.