Multiple Choice Questions on On Wednesday the difference between speeds of the boat going downstream and upstream is 7k........... for Mathematics - All Exams Preparation

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Multiple Choice Questions

On Wednesday the difference between speeds of the boat going downstream and upstream is 7k...........

Quantitative Aptitude ( CCS) Mixed Chart
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    Directions- The following pie chart shows the distance travelled by boat on different days. The speed of the stream is same in both upstream and downstream direction. The table shows the speed of stream at different days. Study the data given carefully and answer the questions based on it.

    Days Speed of the stream (km/hr)
    Sunday 2
    Monday 3
    Tuesday 2.5
    Wednesday -
    Thursday 2

    On Wednesday the difference between speeds of the boat going downstream and upstream is 7km/hr and also the ratio of the speed of boat going downstream and upstream 11: 4. If the total time taken by boat to cover downstream and upstream distances on Wednesday is 26 hours 36 minutes. Find the speed of stream on that day.

    1

    Correct Answer

    1.5

    Incorrect Answer

    2

    Incorrect Answer

    2.5

    Incorrect Answer
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    Explanation:
    Let speed of stream = v
    Ratio of upstream: ratio of downstream= 4:11
    Difference = 7km/hr
    So upstream speed = 4 
    downstream speed=11
    Now
    {22% of 360/ (11+v) + 20%of 300/(4-v)}= 26.6
    On solving we get v = 1km/hr

    By: Amit Kumar
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