Multiple choice

At what speed was a train traveling on a trip when it had completed half of the total distance of the trip? (1) The trip was 460 miles long and took 4 hours to complete. (2) The train traveled at an average rate of 115 miles per hour on the trip.

  1. Statement (1) alone is sufficient, but statement (2) alone is not sufficient.

  2. Statement (2) alone is sufficient, but statement (1) alone is not sufficient.

  3. Both statements together are sufficient, but neither statement alone is sufficient.

  4. Each statement alone is sufficient.

  5. Statements (1) and (2) together are not sufficient.
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Statement 1 gives total distance and time, but not the speed at the halfway point. Statement 2 gives the average speed for the whole trip, which does not define the speed at the halfway point. Even together, they do not provide information about the speed at a specific point in the trip.

AI explanation

Statement (1) gives the total distance of 460 miles and total time of 4 hours, while statement (2) gives the overall average speed of 115 mph. Neither statement provides the actual speed of the train at the exact moment it crossed the halfway mark, as the train could have been accelerating, decelerating, or traveling at a constant speed. Therefore, even both statements together are insufficient.

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