9th Class Science Sample Paper Science Olympiad Model Test Paper-21

  • question_answer
    A boy runs for 10 minutes at a uniform speed of 9 km/h. At what speed should he run for next 20 minutes so that the average speed comes to 12 km/h.

    A) 13.5 km/h

    B) 14.5 km/h

    C) 15 km/h

    D) 12.5 km/h

    E) None of these

    Correct Answer: A

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