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7th Class Mathematics Exponents and Power Question Bank Exponents and Powers

  • question_answer
    A rectangular piece of land is to be sold off in smaller pieces. The total area of the land is 217 sq. miles. The pieces to the cut out are 162 sq. miles in size. How many smaller pieces of the land can be sold at the given size?              

    A)  215                

    B)  164                

    C)         29                  

    D)         None of these             

    Correct Answer: C

    Solution :

    Required number of pieces \[=\frac{Total\,\,area\,of\,land}{Area\,of\,each\,piece}=\frac{{{2}^{17}}}{{{16}^{2}}}=\frac{{{2}^{17}}}{{{\left( {{2}^{4}} \right)}^{2}}}={{2}^{9}}\]


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