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SSC Sample Paper Mock Test-8 SSC CGL Tear-II Paper-1

  • question_answer
    A man rows 30 km downstream and 18 km upstream, taking 5 h each time. What is the velocity of the stream?

    A)                          3.4 km/h

    B)  1.2 km/h   

    C)  9.7 km/h

    D)  11.2 km/h  

    Correct Answer: B

    Solution :

      Speed downstream \[=\frac{30}{5}\text{km/h}\,\,\text{=}\,\,\text{6}\,\,\text{km/h}\text{.}\] Speed upstream \[=\frac{18}{5}\text{km/h}\,\,\text{=}\,\,\text{3}\text{.6}\,\,\text{km/h}\] Velocity of the stream \[=\frac{1}{2}(6-3.6)km/h\] \[=\frac{2.4}{2}\text{km/h}\]


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