Multiple Choice Questions on A man rows lsquo k rsquo km upstream and back again downstream to the same point in H hours The spee........... for Mathematics - All Exams Preparation

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Multiple Choice Questions

A man rows lsquo k rsquo km upstream and back again downstream to the same point in H hours The spee...........

Quant (SSC) Boats and Streams
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    A man rows ‘k’ km upstream and back again downstream to the same point in H hours. The speed of rowing in still water is s km/hr and the rate of stream is r km/hr. Then

    (s2-r2) =2sk /H

    Correct Answer

    (r + s) = kH / (r -s)

    Incorrect Answer

    rs = kH

    Incorrect Answer

    None of the above

    Incorrect Answer
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    Explanation:

    Time taken to cover total distance = H hrs.
    Speed of upstream = s - r. Speed of downstream = s + r.
    ∴ k / (s + r) + k / (s - r) = H
    ⇒(s2-r2) = 2sk /H

    By: Amit Kumar
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