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8th Class Mathematics Rational Numbers Question Bank Rational Numbers

  • question_answer
    \[\left( \mathbf{0}\mathbf{.}\overline{\mathbf{11}}\mathbf{+0}\mathbf{.}\overline{\mathbf{22}} \right)\times \mathbf{30}=?\]

    A)  20                               

    B)  10

    C)  100                             

    D)  \[\frac{1}{10}\]

    Correct Answer: B

    Solution :

    (b): \[\left( 0.\overline{11}+0.\overline{22} \right)\times 30=\left( \frac{11}{99}+\frac{22}{99} \right)\times 30\] \[=\frac{33}{90}\times 30=\frac{990}{90}=11\]


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