Multiple Choice Questions on A person rows 2km against the current in 1 hour and 1 km along with the current in 10 minutes How lo........... for CDS Exam Preparation

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Multiple Choice Questions

A person rows 2km against the current in 1 hour and 1 km along with the current in 10 minutes How lo...........

Quantitative Aptitude (CDS) Boats and Streams
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    A person rows 2km against the current in 1 hour and 1 km along with the current in 10 minutes. How long will it take to go 5 km in stationary water?

    75minutes

    Correct Answer

    85minutes

    Incorrect Answer

    55minutes

    Incorrect Answer

    50minutes

    Incorrect Answer
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    Explanation:

    Let upstream speed = USS and downstream speed = DSS
    The speed of boat be x.
    USS = 2km/h
    DSS = 1km/10 ×60 = 6kmph
    x = (USS+DSS)/2 
    = (6+2) /2 = 4kmph
    Time taken = distance / speed
    = 5/4 hour = 1 hour 15minutes
    = 75minutes

    By: bhavesh kumar singh
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