Multiple Choice Questions on A boat running downstream covers a distance of 24km in 4hrs while for covering the same distance ups........... for PCS Exam Preparation

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Multiple Choice Questions

A boat running downstream covers a distance of 24km in 4hrs while for covering the same distance ups...........

Quantitative Aptitude (PCS) Boats and Streams
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    A boat running downstream covers a distance of 24km in 4hrs, while for covering the same distance upstream it takes 6hrs, what is the speed of the boat in still water ?

    12kmph

    Incorrect Answer

    10kmph

    Incorrect Answer

    5kmph

    Correct Answer

    7kmph

    Incorrect Answer
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    Explanation:

    24/x-y = 6
    6x – 6y = 24………….(1)
    24/x+y = 4
    4x+4y = 24………….(2)
    24x – 24y = 96
    24x+24y = 144
    Solve abv 2 equ
    48x = 240
    X = 240/48 = 5

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