Multiple choice

Directions: The question below is followed by three statements (A), (B) and (C). You have to determine which statement(s) is/are sufficient/necessary to answer the question. What is the speed of the train? Statements: A. The train overtakes Sam in 7.5 seconds and Kunal in 8 seconds. B. Sam and John walk at the speeds of 5 km/hr and 6 km/hr, respectively. C. Sam and John are walking in the same direction as that of the train.

  1. Any two of the three

  2. Either A or B

  3. Either B or C

  4. All of the three

  5. Only C
Reveal answer Fill a bubble to check yourself
D Correct answer
AI explanation

Statement A provides two different overtake times for two people, and statement B provides the speed of Sam. This is insufficient because we do not know if Sam and John are walking in the same direction as the train. Statement C is needed to confirm the direction, making all three statements necessary to establish the relative speeds and solve the equations for the train's speed.

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