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8th Class Mathematics Rational Numbers Question Bank Rational Numbers

  • question_answer
    The area of a rectangle is \[45\frac{5}{16}c{{m}^{2}}\]. If one edge is \[6\frac{1}{4}cm,\] find the other in cm.

    A)  \[7\frac{1}{8}\]                               

    B)                         \[\frac{7}{4}\]                  

    C)                         \[7\frac{1}{4}\]                               

    D)                         \[4\frac{1}{7}\]

    Correct Answer: C

    Solution :

    Area of the rectangle \[=45\frac{5}{16}\,c{{m}^{2}}=\frac{725}{16}\,c{{m}^{2}}\] One edge \[=6\frac{1}{4}\,cm=\,\frac{25}{4}\,cm\] The other edge \[=\left( \frac{725}{16}\div \frac{25}{4} \right)=7\frac{1}{4}\,cm\]


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