9th Class Science Sample Paper Science Olympiad Model Test Paper-15

  • question_answer
    A boy weighs 30 kg. Suppose his entire body is made up of electrons. How many electrons are there in his body?

    A) \[2.29\times {{10}^{31}}\]

    B) \[3.30\times {{10}^{31}}\]

    C) \[4.50\times {{10}^{31}}\]

    D) \[6.67\times {{10}^{31}}\]

    E) None of these

    Correct Answer: B


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