Multiple Choice Questions on The upstream speed of the boat is 40 km hr and the speed of the boat in still water is 55 km hr What........... for RRB(NTPC) Exam Preparation

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Multiple Choice Questions

The upstream speed of the boat is 40 km hr and the speed of the boat in still water is 55 km hr What...........

Quantitative Aptitude (RRB NTPC) Boats and Streams
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    The upstream speed of the boat is 40 km/hr and the speed of the boat in still water is 55 km/hr. What is the downstream speed of the boat?

    75 km/hr

    Incorrect Answer

    70 km/hr

    Correct Answer

    60 km/hr

    Incorrect Answer

    65 km/hr

    Incorrect Answer
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    Explanation:
    Upstream speed = 40
    Boat – stream = 40
    55 – stream = 40
    ∴ stream = 15
    ∴ Downstream speed = 55 + 15 = 70 km/hr

    By: Barka Mirza
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