Multiple choice

A train running at the speed of 20 m/sec crosses a pole in 24 seconds less than the time required to cross a platform whose length is thrice of that of the train at the same speed. What is the length of the train?

  1. 100

  2. 120

  3. 160

  4. 240

  5. 250
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

When a train crosses a pole, distance traveled equals its length. When crossing a platform three times its length, total distance is 4× length. Time difference = (4L - L)/20 = 3L/20 seconds. Given this equals 24 seconds: 3L/20 = 24, so L = 160 meters.

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