Multiple Choice Questions on If Rohan rows 15 km upstream in 3 hours and 21 km downstream in 3 hours then the speed of the ........... for Mathematics - All Exams Preparation

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Multiple Choice Questions

If Rohan rows 15 km upstream in 3 hours and 21 km downstream in 3 hours then the speed of the ...........

Quantitative Aptitude ( CCS) Boats and Streams
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     If Rohan rows 15 km upstream in 3 hours and 21 km downstream in 3 hours, then the speed of the stream is

    8 km/h

    Incorrect Answer

    3 km/h

    Incorrect Answer

    1 km/h

    Correct Answer

    2 km/h

    Incorrect Answer
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    Explanation:

    Rate upstream = (15/3) kmph 
    Rate downstream (21/3) kmph = 7 kmph. 
    Speed of stream (1/2)(7 - 5)kmph = 1 kmph

    By: MIRZA SADDAM HUSSAIN
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