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Railways Sample Paper RRBs Assistant Loco Pilot and Technician CBT STAGE-I Sample Paper-17

  • question_answer
    Anna is 5 times as old as Rita. In 2 yr Anna will be 3 times as old and in 6 yr twice as old. How old will Anna be in 7 yr?

    A)  17 yr

    B)         15yr

    C)  21 yr               

    D)  32 yr

    Correct Answer: A

    Solution :

    Percentage age of Anna and Rita are 5x yr and x yr, then according to the question, \[\frac{(5x+2)}{(x+2)}=3\Rightarrow 5x+2=3x+6\] \[\therefore \]      \[x=\frac{4}{2}=2\] and       \[\frac{(5x+6)}{(x+6)}=2\] \[\Rightarrow \]   \[5x+6=2x+12\] \[\therefore \]      \[x=\frac{6}{3}=2\] \[\therefore \] Age of Anna after \[7\,\,yr=5x+7\] \[=5\times 2+7\] \[=17\,\,yr\]


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