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SSC Sample Paper Mock Test-15 SSC CGL Tear-II Paper-1

  • question_answer
    A man can row at 5 km/h in still water. If the river is running at 1 km/h, it takes him 75 min to row to a place and back. How far is the place?

    A) 2.5 km

    B)  3 km

    C)  4 km   

    D)  5 km

    Correct Answer: B

    Solution :

    Speed downstream = (5 + 1) km/h = 6 km/h Speed upstream = \[(5-1)\]km/h = 4 km/h Let the required distance be x km. Then, \[\frac{x}{6}+\frac{x}{4}=\frac{75}{60}=\frac{5}{4}\Rightarrow (2x+3x)=15\] \[\Rightarrow \]   \[5x=15\]\[\Rightarrow \]\[x=3\] Required distance = 3 km


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