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

  • question_answer
    A person starts going for evening walk everyday. The distance walked by him on the first day was 4 km. Everyday he walks half of the distance walked on the previous day. What can be the maximum total distance walked by him in his life time?

    A) 36 km              

    B)  240 km

    C)  8 km   

    D)  Data inadequate

    Correct Answer: C

    Solution :

    1st day =4 km, 2nd day \[=4\times \frac{1}{2}=2\]km, 3rd day\[=2\times \frac{1}{2}=1\]km \[\therefore \]Total distance \[S=4+2+1+\frac{1}{2}+\frac{1}{4}+...\] Which is infinite GP with \[a=4,\]\[r=\frac{1}{2}\] So, \[S=\frac{a}{1-r}=\frac{4}{1-\frac{1}{2}}=\frac{4}{\frac{1}{2}}=8\]km


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