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SSC Sample Paper Mock Test-15 SSC CGL Tear-II Paper-1

  • question_answer
    One year ago, a man was 7 times as old as his son. Now, his age is equal to the square of his son's age. The present age of the man will be

    A) 7 yr      

    B)  36 yr

    C)  49 yr   

    D)  64 yr

    Correct Answer: B

    Solution :

    Let the present age of the son be x year. Man's present age\[=[7(x-1)+1]\]yr \[=(7x-6)\]yr \[\therefore \]      \[\]\[\Rightarrow \]\[{{x}^{2}}-7x+6=0\] \[(x-6)(x-1)=0\]\[\Rightarrow \]\[x=6\] or \[x=1\] \[\therefore \] Man's present age \[=(7\times 6-6)\]yr = 36 yr


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