Multiple Choice Questions on A person can row a distance of one km upstream in ten minutes and downstream in four minutes What is........... for Mathematics - All Exams Preparation

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Multiple Choice Questions

A person can row a distance of one km upstream in ten minutes and downstream in four minutes What is...........

Quantitative Aptitude ( CCS) Boats and Streams
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    A person can row a distance of one km upstream in ten minutes and downstream in four minutes. What is the speed of the stream ?

    4.5 km/hr

    Correct Answer

    4 km/hr

    Incorrect Answer

    9 km/hr

    Incorrect Answer

    5.6 km/hr

    Incorrect Answer
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    Explanation:

    Upstream speed, U = 1 km/ (10/60 hr) = 6 km/hr
    Downstream speed, D = 1 km/ (4/60 hr.) = 15 km/hr
    Speed of the stream, y = (D - U)/2 = (15- 6)/2 = 9/2 = 4.5 km/hr.

    By: Pranav Gupta
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