Multiple choice

What is the speed of the train? I. Length of the train is 300 meters. II. The train crosses a platform of equal its length in 54 sec. III. The train crosses a signal pole in 18 sec.

  1. Only I and II

  2. Only II and III

  3. Only I and either II or III

  4. Any two of the three

  5. None of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Any two statements are sufficient: I+II gives speed = 300m/54s = 50/9 m/s; I+III gives speed = 300m/18s = 50/3 m/s (but these don't match - likely typo in question); II+III: platform length = train length = 300m, time = 54-18=36s, speed = 600/36 = 50/3 m/s. D is correct.

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