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Thread: At what speed was a car traveling

  1. #1
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    At what speed was a car traveling

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    At what speed was a car traveling when it had completed half of the distance of a trip?
    (1) The car was traveling at an average speed of 65 miles per hour.
    (2) The entire trip was 190 miles long and took 3 hours to complete.

    A) Statement (1) BY ITSELF is sufficient to answer the question, but statement (2) by itself is not.

    B) Statement (2) BY ITSELF is sufficient to answer the question, but statement (1) by itself is not.

    C) Statements (1) and (2) TAKEN TOGETHER are sufficient to answer the question, even though NEITHER statement BY ITSELF is sufficient.

    D) Either statement BY ITSELF is sufficient to answer the question.

    E) Statements (1) and (2) TAKEN TOGETHER are NOT sufficient to answer the question, requiring more data pertaining to the problem.

  2. #2
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    Re: At what speed was a car traveling

    1) insufficient. average speed is (total distance / total time). you do not know at which speed the car was travelling when it had completed half of the distance
    2) insufficient. you can only calculate the average speed

    together...both are still insufficient. just tells you what the average speed is. to get the speed for half of the distance, you need to know the amount of time taken to taken the first half of the distance. this information is not given.

    answer is E.

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