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SSC Quantitative Aptitude Boats & Streams Question Bank Train and Boat (I)

  • question_answer
    A boat covers a distance of 30 km in \[2\frac{1}{2}h\] running downstream. While returning, it covers the q same distance in \[3\frac{3}{4}h.\] What is 4 the speed of the boat in still water?

    A) 8 km/h

    B) 12 km/h

    C) 14 km/h

    D) 10 km/h

    Correct Answer: D

    Solution :

    [d] Speed downstream \[=\left( 30\times \frac{2}{5} \right)\,km/h=12\,km/h\] Speed upstream\[=\left( 30\times \frac{4}{15} \right)\,km/h\] \[=8\,km/h\] Speed of boat in still water \[=\frac{1}{2}(12+8)\,km/h=10\,km/h\]


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