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Railways Sample Paper RRBs Assistant Loco Pilot and Technician CBT STAGE-I Sample Paper-3

  • question_answer
    A father is 30 times older than his son. 18 yr later, he will be only thrice as old as his son. Father's present age (in yr) is

    A)  25                   

    B)  30  

    C)  40       

    D)  45

    Correct Answer: C

    Solution :

    Let the age of son is x yr, then the age of father will be 30x yr. \[30x+18=3\left( x+18 \right)\] \[\Rightarrow \]   \[27x=36\] \[\Rightarrow \]       \[x=\frac{4}{3}\] \[\therefore \,\] Age of father\[=30\times \frac{4}{3}=40\,\,yr\]


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