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8th Class Mathematics Algebraic Expressions Question Bank Algebra

  • question_answer
    A's present age is to B's present age as 7:9. Nine years ago, their ages were in the ratio of 2:3. Find the present age of A.

    A) 27 years                      

    B) 21 years

    C) 25 years                      

    D) 22 years

    Correct Answer: B

    Solution :

    Let A?s present age and B?s present age be 7x and 9x respectively. Then, 9 years ago, \[(-8,0)\]  \[\left( -\frac{4}{3},2 \right)\]  \[\frac{x}{x-1}+\frac{x-1}{x}=2\frac{1}{2}\]yrs \[(5,4)\]  A?s present age \[(5,-4)\]yrs.


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