Multiple choice

The questions given below contain two statements giving certain data. You have to decide whether the data given in the statements are sufficient for answering the question ? How much distance did the train cover ? I. The average speed of train is 40 km/hr. II. During its 8 hours journey it runs 3 hours at 75 km./hr. and 5 hours at 45 km/hr.

  1. statement I alone is sufficient but statement II alone is not sufficient.

  2. statement II alone is sufficient but statement I alone is not sufficient.

  3. each statement alone (either I or II) is sufficient.

  4. statement I and II together are not sufficient.

  5. both statement together are sufficient, but neither statement alone is sufficient.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Statement II alone is sufficient. Distance = speed × time. Given: 3 hours at 75 km/hr + 5 hours at 45 km/hr. Distance = (3 × 75) + (5 × 45) = 225 + 225 = 450 km. Statement I only gives average speed (40 km/hr) without time or distance, which is insufficient alone.

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