Multiple Choice Questions on A boatman can row 4 km against the stream in 20 minutes and return in 24 minutes Find the speed of b........... for Mathematics - All Exams Preparation

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Multiple Choice Questions

A boatman can row 4 km against the stream in 20 minutes and return in 24 minutes Find the speed of b...........

Quantitative Aptitude ( CCS) Boats and Streams
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    A boatman can row 4 km against the stream in 20 minutes and return in 24 minutes. Find the speed of boatman in still water ?

    10 km/hr

    Incorrect Answer

    8 km/hr

    Incorrect Answer

    15 km/hr

    Incorrect Answer

    11 km/hr

    Correct Answer
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    Explanation:

    Solution: 
    Upstream speed = (4/20) * 60 = 12 km/hr
    Downstream speed = (4/24) * 60 = 10 km/hr
    Speed of boatman = (1/2) * (12+10) = 11 km/hr

    By: Pranav Gupta
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