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SSC Sample Paper SSC CHSL (10+2) Sample Test Paper-24

  • question_answer
    A man goes from a place A to B at a speed of \[29\text{ }km/hr\]and returns from B to A at the speed of\[58\text{ }km/hr\]. The average speed of man in whole journey is -

    A)  \[43\frac{1}{2}\,km\,hr\]                       

    B)  \[38\frac{2}{3}\,km\,hr\]

    C)  \[39\,\,km\,hr\]              

    D)  \[42\,\,km\,hr\]

    Correct Answer: B

    Solution :

     Average speed \[=\frac{2xy}{x+y}\] \[=\,\,\,\,\frac{2\times 58\times 29}{58+29}=\frac{3364}{87}=\,\underline{\,\mathbf{38}\frac{\mathbf{2}}{\mathbf{3}}\mathbf{km}\mathbf{./hr}\mathbf{.}}\]


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