Multiple Choice Questions on A man can row upstream 10 kmph and downstream 20 kmph Find the man rate in still water and rat........... for Mathematics - All Exams Preparation

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Multiple Choice Questions

A man can row upstream 10 kmph and downstream 20 kmph Find the man rate in still water and rat...........

Quantitative Aptitude ( CCS) Boats and Streams
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     A man can row upstream 10 kmph and downstream 20 kmph. Find the man rate in still water and rate of the stream.

    0,5

    Incorrect Answer

    10,5

    Incorrect Answer

    15,5

    Correct Answer

    7,5

    Incorrect Answer
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    Explanation:

    Please remember,
    If a is rate downstream and b is rate upstream 
    Rate in still water = 1/2(a+b)
    Rate of current = 1/2(a-b)
    => Rate in still water = 1/2(20+10) = 15 kmph
    => Rate of current = 1/2(20-10) = 5 kmph

    By: MIRZA SADDAM HUSSAIN
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