Railways Sample Paper RRB (Assistant Loco Pilot & Technician) Sample Test Paper-4

  • question_answer
    The present ages of Chetna and Shikha are in the ratio of 5 : 7 respectively. After 7 years, their ages will be in the ratio of 11 : 14 respectively. What is the difference between their ages?

    A)  9 years                        

    B)  4 years

    C)  5 years            

    D)       None of these

    Correct Answer: D

    Solution :

     Let the present ages of Chetana and Shikha be \[5x\] and \[7x\] years respectively. After 7 years,        \[\frac{5x+7}{7x+7}=\frac{11}{14}\] \[\Rightarrow \] \[\frac{5x+7}{x+1}=\frac{11}{2}\]  \[\Rightarrow \] \[11x+11=10x+14\] \[\Rightarrow \] \[x=3\] \[\therefore \] Required difference \[=7x-5x=2x=2\,\,\,\,3=6\] years

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