Multiple Choice Questions on A boat goes 40 km in the stream in 8 hours 36 km downstream in 6 hours The speed of the boat in stil........... for IBPS RRB - Office Assistant/ Clerical Exam Preparation

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Multiple Choice Questions

A boat goes 40 km in the stream in 8 hours 36 km downstream in 6 hours The speed of the boat in stil...........

Quantitative Aptitude(IBPS RRB CL) Boats and Streams
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    A boat goes 40 km in the stream in 8 hours 36 km downstream in 6 hours. The speed of the boat in still water is

    6.5 km/hour

    Incorrect Answer

    5.5 km/hour

    Correct Answer

    6 km/hour

    Incorrect Answer

    5 km/hour

    Incorrect Answer
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    Explanation:

    Speed of upstream, U = 40/8 = 5 km/h
    Speedo of Downstream, D = 36/6 = 6 km/h
    Speed of boat in still water, x = (D + U)/2
    = (5 + 60)/2 = 11/2 = 5.5 km/h.

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