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  3. 10th Class
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10th Class Science Sample Paper Science Olympiad Model Test Paper-3

  • question_answer
    If the radius of curvature of a spherical mirror is 40 cm, what is its focal length?

    A) 40 cm

    B) 80 cm

    C) 20 cm

    D) 10 cm

    E) None of these

    Correct Answer: C

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