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10th Class Science Sample Paper Science Olympiad Model Test Paper-21

  • question_answer
    At what distance from a concave mirror of focal length 10 cm should an object be placed so that its real image is formed 20 cm from the mirror?

    A) 10 cm

    B) 25 cm

    C) 30 cm

    D)  12 cm

    E)  None of these

    Correct Answer: E

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