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7th Class Mathematics Comparing Quantities Question Bank Comparing Quantities

  • question_answer
    If\[A:B=7:9\] and\[B:C=6:7\]then\[A:C\]is

    A) 2 : 3          

    B) 3 : 2

    C) 1 : 3                            

    D) 2 : 7

    Correct Answer: A

    Solution :

        \[\frac{A}{B}=\frac{7}{9};\,\,\frac{B}{C}=\frac{6}{7}\] \[\frac{A}{C}=\frac{A}{B}\times \,\frac{B}{C}=\frac{7}{9}\times \frac{6}{7}=\frac{2}{3}\] \[A:C=2:3\]                


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