Multiple Choice Questions on Speed of motorboat in still water is 45 km h If the motorboat travels 80 km along the stream in 1 ho........... for IBPS RRB - Office Assistant/ Clerical Exam Preparation

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Multiple Choice Questions

Speed of motorboat in still water is 45 km h If the motorboat travels 80 km along the stream in 1 ho...........

Quantitative Aptitude(IBPS RRB CL) Boats and Streams
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    Speed of motorboat in still water is 45 km/h. If the motorboat travels 80 km along the stream in 1 hour 20 minutes, then the time taken by it to cover the same distance against the stream will be

    3 hours

    Incorrect Answer

    1 hour 20 minutes

    Incorrect Answer

    2 hours 40 minutes

    Correct Answer

    2 hours 55 minutes

    Incorrect Answer
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    Explanation:

    B=45km/hrs T=D/S = 80/30 =2 2/3 hrs

    D.S=80/(4/3) =60km/hrs T=2hr40mins Ans.

    B= (D.S+U.S)/2
    45×2 =60+U.S
    U.S=30km/hrs

    Hence, Option 3 is the correct Answer.

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