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Railways PYQCBT 2 2017

RRB NTPC · Question 86

Car I covers a distance in a certain time. Car II takes double the time to cover half the same distance. Find the ratio of their respective speeds.

  1. 1 : 2

  2. 1 : 4

  3. 2 : 1

  4. 4 : 1

Show answer & explanation

Answer: (D) 4 : 1

Explanation

Car I's speed = d/t. Car II's speed = (d/2)/(2t) = d/(4t). The ratio is 1 : 1/4 = 4 : 1.